Title: The Best 4 Star Hotels in Posidonia from $95 | Expedia.com [Posidonia Travel Guide](https://expedia.com/Posidonia.dx6130901)[Hotels in Posidonia](https://expedia.com/Posidonia-Hotels.d6130901.Travel-Guide-Hotels)[Vacation Rentals in Posidonia](https://expedia.com/Posidonia-Vacation-Rentals.d6130901.Travel-Guide-VacationRentals)[Flights to Posidonia](https://expedia.com/Cheap-Flights-To-Posidonia.d6130901.Travel-Guide-Flights)[Car Rentals in Posidonia](https://expedia.com/Car-Rentals-In-Posidonia.d6130901.Car-Rental-Guide)[Posidonia Vacation Packages](https://expedia.com/Posidonia.d6130901.Destination-Travel-Guides) ![Default HTG hotel image](https://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_lodging_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_lodging_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__price_find.svg) ### Upfront pricing Our total price for your stay includes taxes and fees - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Treat yourself Save 10% or more on over 100,000 hotels worldwide with Member Prices [Learn about One Key](https://www.expedia.com/welcome-one-key) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__bed.svg) ### Be picky Search almost a million properties worldwide ## Check availability on Posidonia 4 Star Hotels Tonight [Mar 28 - Mar 29](https://www.expedia.com/Hotel-Search?regionId=6130901&startDate=2026-03-28&endDate=2026-03-29&adults=2&star=40&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) Tomorrow [Mar 29 - Mar 30](https://www.expedia.com/Hotel-Search?regionId=6130901&startDate=2026-03-29&endDate=2026-03-30&adults=2&star=40&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) Next weekend [Apr 3 - Apr 5](https://www.expedia.com/Hotel-Search?regionId=6130901&startDate=2026-04-03&endDate=2026-04-05&adults=2&star=40&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) In two weeks [Apr 10 - Apr 12](https://www.expedia.com/Hotel-Search?regionId=6130901&startDate=2026-04-10&endDate=2026-04-12&adults=2&star=40&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) ## Our top choices for Posidonia 4-star hotels ![Exterior](https://images.trvl-media.com/lodging/10000000/9130000/9128600/9128551/25b1615a.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Interior](https://images.trvl-media.com/lodging/10000000/9130000/9128600/9128551/b0305faf.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Restaurant](https://images.trvl-media.com/lodging/10000000/9130000/9128600/9128551/ee482c14.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Minibar, in-room safe, desk, free cribs/infant beds](https://images.trvl-media.com/lodging/10000000/9130000/9128600/9128551/96d62bd5.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Diogenis Hotel [](https://www.expedia.com/Syros-Hotels-Diogenis-Hotel.h9128551.Hotel-Information) Syros 9.4/10 Exceptional (108 reviews) "Clean modern room, good breakfast and helpfull staff." ![United States](https://a.travel-assets.com/egds/marks/flags/us.svg) Conny $83 nightly $95 total Apr 8 - Apr 9 Total with taxes and fees [](https://www.expedia.com/Syros-Hotels-Diogenis-Hotel.h9128551.Hotel-Information) ![Free daily buffet breakfast](https://images.trvl-media.com/lodging/1000000/530000/520700/520606/50b4cfd9.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![The Dolphin Bay Suite with Panoramic Sea View | Premium bedding, pillowtop beds, in-room safe, desk](https://images.trvl-media.com/lodging/1000000/530000/520700/520606/6c4cda14.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Beach nearby, beach towels, beach volleyball](https://images.trvl-media.com/lodging/1000000/530000/520700/520606/34b0bbb9.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Aerial view](https://images.trvl-media.com/lodging/1000000/530000/520700/520606/8fb07804.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Dolphin Bay Seaside Resort & Suites [](https://www.expedia.com/Syros-Hotels-Dolphin-Bay-Hotel.h520606.Hotel-Information) Syros 8.4/10 Very Good (89 reviews) "Great family hotel next to beautiful beach." ![Australia](https://a.travel-assets.com/egds/marks/flags/au.svg) George [](https://www.expedia.com/Syros-Hotels-Dolphin-Bay-Hotel.h520606.Hotel-Information) ![Free daily continental breakfast](https://images.trvl-media.com/lodging/5000000/4430000/4426300/4426239/8d2bed05.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Lobby sitting area](https://images.trvl-media.com/lodging/5000000/4430000/4426300/4426239/a51af56c.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Deluxe Room with Sea View (Main Building) | Premium bedding, in-room safe, laptop workspace, iron/ironing board](https://images.trvl-media.com/lodging/5000000/4430000/4426300/4426239/2f2f8088.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Front of property - evening/night](https://images.trvl-media.com/lodging/5000000/4430000/4426300/4426239/fda4962a.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Syrou Melathron [](https://www.expedia.com/Syros-Hotels-Syrou-Melathron.h4426239.Hotel-Information) Syros 8.8/10 Excellent (71 reviews) "This hotel is historic and beautiful. An easy walk to restaurants and shops. The staff was great. " ![United States](https://a.travel-assets.com/egds/marks/flags/us.svg) michael $103 nightly $129 total Apr 13 - Apr 14 Total with taxes and fees [](https://www.expedia.com/Syros-Hotels-Syrou-Melathron.h4426239.Hotel-Information) ![Front of property - evening/night](https://images.trvl-media.com/lodging/56000000/55410000/55406700/55406612/eacdce08.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Family Suite, Private Pool, Sea View (Connecting) | Beach/ocean view](https://images.trvl-media.com/lodging/56000000/55410000/55406700/55406612/d559cccd.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Minibar, in-room safe, blackout drapes, iron/ironing board](https://images.trvl-media.com/lodging/56000000/55410000/55406700/55406612/8db6a00f.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Exterior](https://images.trvl-media.com/lodging/56000000/55410000/55406700/55406612/2773d699.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Infinity View Hotel [](https://www.expedia.com/Tinos-Hotels-Infinity-View-Hotel.h55406612.Hotel-Information) Tinos 10/10 Exceptional (46 reviews) "Outstanding breakfast, wonderful staff and pool was refreshing. Highly recommend." ![Canada](https://a.travel-assets.com/egds/marks/flags/ca.svg) Robert [](https://www.expedia.com/Tinos-Hotels-Infinity-View-Hotel.h55406612.Hotel-Information) ![Restaurant](https://images.trvl-media.com/lodging/69000000/68420000/68419200/68419104/3f34fe82.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Porch](https://images.trvl-media.com/lodging/69000000/68420000/68419200/68419104/724dca33.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Signature Room | Premium bedding, minibar, in-room safe, individually decorated](https://images.trvl-media.com/lodging/69000000/68420000/68419200/68419104/401bcc6f.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Hot tub, steam room, body treatments, hydrotherapy, aromatherapy](https://images.trvl-media.com/lodging/69000000/68420000/68419200/68419104/a013bbb4.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Castro Hotel Syros [](https://www.expedia.com/Syros-Hotels-Castro-Suites.h68419104.Hotel-Information) Syros 9.8/10 Exceptional (40 reviews) "Beautiful hotel , staff was friendly and helpful Rooms where great , clean and comfy " ![Canada](https://a.travel-assets.com/egds/marks/flags/ca.svg) Enrique $132 nightly $161 total Apr 28 - Apr 29 Total with taxes and fees [](https://www.expedia.com/Syros-Hotels-Castro-Suites.h68419104.Hotel-Information) ![Seasonal outdoor pool](https://images.trvl-media.com/lodging/2000000/1510000/1507300/1507285/w2396h1600x0y0-9a901041.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![View from property](https://images.trvl-media.com/lodging/2000000/1510000/1507300/1507285/3decca10.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Free daily buffet breakfast](https://images.trvl-media.com/lodging/2000000/1510000/1507300/1507285/65dda8d9.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Exterior](https://images.trvl-media.com/lodging/2000000/1510000/1507300/1507285/4fa22edc.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Hotel Benois [](https://www.expedia.com/Syros-Hotels-Hotel-Benois.h1507285.Hotel-Information) Syros 9.6/10 Exceptional (125 reviews) "Had a wonderful week here, the staff were lovely and friendly, the property is beautiful, food was delightful and the close proximity to the gorgeous beach all made it a memorable stay! " ![United States](https://a.travel-assets.com/egds/marks/flags/us.svg) Susan $104 nightly $130 total Apr 15 - Apr 16 Total with taxes and fees [](https://www.expedia.com/Syros-Hotels-Hotel-Benois.h1507285.Hotel-Information) ![Front of property - evening/night](https://images.trvl-media.com/lodging/25000000/24450000/24441200/24441112/070e6d85.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Green Bedroom, Mezzanine Studio | Living area | Flat-screen TV](https://images.trvl-media.com/lodging/25000000/24450000/24441200/24441112/c7513c49.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Buffet](https://images.trvl-media.com/lodging/25000000/24450000/24441200/24441112/f75b5dca.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Junior Bedroom, Mezzanine Suite | Living area | Flat-screen TV](https://images.trvl-media.com/lodging/25000000/24450000/24441200/24441112/820d77f3.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Guesthouse Lila [](https://www.expedia.com/Syros-Hotels-GUESTHOUSE-LILA.h24441112.Hotel-Information) Syros 10/10 Exceptional (23 reviews) "Generous, warm, beautiful building. " ![United States](https://a.travel-assets.com/egds/marks/flags/us.svg) Jan $93 nightly $118 total Apr 2 - Apr 3 Total with taxes and fees [](https://www.expedia.com/Syros-Hotels-GUESTHOUSE-LILA.h24441112.Hotel-Information) ![Premium Sea view suite Ground floor | Premium bedding, pillowtop beds, in-room safe, soundproofing](https://images.trvl-media.com/lodging/16000000/15370000/15366100/15366063/90f7a9e3.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Restaurant](https://images.trvl-media.com/lodging/16000000/15370000/15366100/15366063/4af3666d.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Signature Sea View Suite 2 Bedrooms | Beach/ocean view](https://images.trvl-media.com/lodging/16000000/15370000/15366100/15366063/1d0598d2.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Front of property](https://images.trvl-media.com/lodging/16000000/15370000/15366100/15366063/51ca5344.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Tinos Resort Hotel [](https://www.expedia.com/Tinos-Hotels-Tinos-Resort-Hotel.h15366063.Hotel-Information) Tinos 9.4/10 Exceptional (32 reviews) "The owner of this property was extremely friendly, very knowledgable of the area and the room was very clean and the staff that worked there were wonderful! If you’re looking for a true traditional Greek experience, this is the place to stay." ![Canada](https://a.travel-assets.com/egds/marks/flags/ca.svg) Georgina $116 nightly $136 total Mar 29 - Mar 30 Total with taxes and fees [](https://www.expedia.com/Tinos-Hotels-Tinos-Resort-Hotel.h15366063.Hotel-Information) ![Terrace/patio](https://images.trvl-media.com/lodging/6000000/5330000/5321200/5321123/e3ceaf02.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![View from property](https://images.trvl-media.com/lodging/6000000/5330000/5321200/5321123/830a8c01.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Executive Double or Twin Room, 2 Twin Beds, Sea View | Individually decorated, individually furnished, desk, laptop workspace](https://images.trvl-media.com/lodging/6000000/5330000/5321200/5321123/ae9ef647.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Staircase](https://images.trvl-media.com/lodging/6000000/5330000/5321200/5321123/118f5e95.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Hotel Omiros [](https://www.expedia.com/Syros-Hotels-Hotel-Omiros.h5321123.Hotel-Information) Syros 9.4/10 Exceptional (23 reviews) "the stuffs are so friendly :)" ![Japan](https://a.travel-assets.com/egds/marks/flags/jp.svg) Hayata [](https://www.expedia.com/Syros-Hotels-Hotel-Omiros.h5321123.Hotel-Information) ![International cuisine, beach views ](https://images.trvl-media.com/lodging/19000000/18140000/18130400/18130303/0e7007f8.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![International cuisine, beach views ](https://images.trvl-media.com/lodging/19000000/18140000/18130400/18130303/15da6cee.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Exterior](https://images.trvl-media.com/lodging/19000000/18140000/18130400/18130303/2bd65c11.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Triple Room, Sea View | Iron/ironing board, free cribs/infant beds, free WiFi](https://images.trvl-media.com/lodging/19000000/18140000/18130400/18130303/36c54891.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Di Mare [](https://www.expedia.com/Syros-Hotels-Di-Mare.h18130303.Hotel-Information) Syros 8.8/10 Excellent (22 reviews) "Nice hotel and friendly staff but room needs some updates, especially the bathrooms" ![United States](https://a.travel-assets.com/egds/marks/flags/us.svg) Tonje [](https://www.expedia.com/Syros-Hotels-Di-Mare.h18130303.Hotel-Information) ![Seasonal outdoor pool, pool umbrellas, sun loungers](https://images.trvl-media.com/lodging/17000000/16620000/16611900/16611844/c04e3063.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Double Room, Sea View | Beach/ocean view](https://images.trvl-media.com/lodging/17000000/16620000/16611900/16611844/a3d1fd3a.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Double Room, Sea View | Living area | Flat-screen TV](https://images.trvl-media.com/lodging/17000000/16620000/16611900/16611844/0b5d1367.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ![Traditional Studio | Minibar, in-room safe, desk, blackout drapes](https://images.trvl-media.com/lodging/17000000/16620000/16611900/16611844/722e91d8.jpg?impolicy=fcrop&w=357&h=201&p=1&q=medium) ### Faros Resort Hotel [](https://www.expedia.com/Syros-Hotels-Faros-Resort-Hotel.h16611844.Hotel-Information) Syros [](https://www.expedia.com/Syros-Hotels-Faros-Resort-Hotel.h16611844.Hotel-Information) ![](https://a.travel-assets.com/pricing-claim/sparkle_dark.svg) Save an average of 15% on thousands of hotels when you're signed in [Sign in ](https://expedia.com/user/signin?ckoflag=0&uurl=e3id%3Dredr%26rurl%3D%2F4Star-Posidonia-Hotels.s40-0-d6130901.Travel-Guide-Filter-Hotels)[ Sign up, it's free ](https://expedia.com/signup?enable_registration=true&+=&uurl=e3id%3Dredr%26rurl%3D%2F4Star-Posidonia-Hotels.s40-0-d6130901.Travel-Guide-Filter-Hotels) ## Explore similar 5-star hotels Many 5-star hotels have the same amenities as 4-star hotels. See all 5-star hotels in Posidonia. ![Odera, Tinos, Autograph Collection](https://images.trvl-media.com/lodging/104000000/103100000/103095400/103095313/feb69af5_y.jpg?impolicy=resizecrop&rw=402&ra=fit) ### Odera, Tinos, Autograph Collection Vourni Beach Tinos Tinos Island [Get rates](https://expedia.com/Hotel-Search?startDate=4%2F11%2F2026&endDate=4%2F12%2F2026&selected=103095313&PinnedHotelID=103095313&HadPinnedHotel=true®ionId=6130901) [](https://expedia.com/Odera.h103095313.Hotel-Information) ![Tinos Beach Hotel](https://images.trvl-media.com/lodging/120000000/119600000/119597300/119597275/5f05b667_y.jpg?impolicy=resizecrop&rw=402&ra=fit) ### Tinos Beach Hotel Kionia Tinos [Get rates](https://expedia.com/Hotel-Search?startDate=4%2F11%2F2026&endDate=4%2F12%2F2026&selected=119597275&PinnedHotelID=119597275&HadPinnedHotel=true®ionId=6130901) [](https://expedia.com/Tinos-Hotels-Tinos-Beach-Hotel-Suites.h119597275.Hotel-Information) ![Hotel Ploes](https://images.trvl-media.com/lodging/19000000/18450000/18447500/18447487/9f25efc3_y.jpg?impolicy=resizecrop&rw=402&ra=fit) ### Hotel Ploes Apollonos 2, Ermoupoli Syros $304 nightly $363 total Apr 4 - Apr 5 Total with taxes and fees [](https://expedia.com/Syros-Hotels-Hotel-Ploes.h18447487.Hotel-Information) Still don't see what you're looking for? [See all properties in Posidonia.](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40) You can also use these popular filters to refine your search. [Pool](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40&star=40&amenities=POOL)[Spa](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40&star=40&amenities=SPA_ON_SITE)[Hot tub](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40&star=40&amenities=HOT_TUB)[Breakfast included](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40&star=40&amenities=FREE_BREAKFAST)[Waterpark](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Hotel&startDate=3%2F29%2F2026&endDate=3%2F30%2F2026®ionId=6130901&star=40&star=40&amenities=WATER_PARK) Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply. ## Top Posidonia Hotel Reviews ![Diogenis Hotel](https://images.trvl-media.com/lodging/10000000/9130000/9128600/9128551/25b1615a_y.jpg) ### Diogenis Hotel 10/10 Excellent "Excellent location right opposite the ferry. Clean room, friendly staff." [](https://expedia.com/Syros-Hotels-Diogenis-Hotel.h9128551.Hotel-Information) ![Hotel Benois](https://images.trvl-media.com/lodging/2000000/1510000/1507300/1507285/w2396h1600x0y0-9a901041_y.jpg) ### Hotel Benois 10/10 Excellent "Had a wonderful week here, the staff were lovely and friendly, the property is beautiful, food was delightful and the close proximity to the gorgeous beach all made it a memorable stay! " [](https://expedia.com/Syros-Hotels-Hotel-Benois.h1507285.Hotel-Information) ![Infinity View Hotel](https://images.trvl-media.com/lodging/56000000/55410000/55406700/55406612/eacdce08_y.jpg) ### Infinity View Hotel 10/10 Excellent "The breakfast included a wide variety of options." [](https://expedia.com/Tinos-Hotels-Infinity-View-Hotel.h55406612.Hotel-Information) ![Dolphin Bay Seaside Resort & Suites](https://images.trvl-media.com/lodging/1000000/530000/520700/520606/50b4cfd9_y.jpg) ### Dolphin Bay Seaside Resort & Suites 10/10 Excellent "Great family hotel next to beautiful beach." [](https://expedia.com/Syros-Hotels-Dolphin-Bay-Hotel.h520606.Hotel-Information) ![Castro Hotel Syros](https://images.trvl-media.com/lodging/69000000/68420000/68419200/68419104/3f34fe82_y.jpg) ### Castro Hotel Syros 10/10 Excellent "Nicely tucked off in the narrow streets, with easy and quick access to clothing shops, restaurants and bars. It is a 5 minute walk from the ferry terminal and provides you with a clean and friendly environment to rest your head." [](https://expedia.com/Syros-Hotels-Castro-Suites.h68419104.Hotel-Information) ## Find out more about Posidonia ## Posidonia Four Star Hotel Information When you need to book a room with luxurious amazing amenities and the best rates, the 4 star hotels in Posidonia, Syros are incredible options. Known for their extra perks, first-rate service, and fantastic locations, each of the Posidonia 4 star hotels offers the ultimate experience for globe-trotting travelers. Relax in your expertly designed room. Kick back with around-the-clock room service. Get a good night’s sleep with the ultra-plush bedding, and freshen up in the morning with designer-inspired body products. It’s all available when you stay at one of the top book a four star hotels in Posidonia. What’s more, thanks to Expedia you might even score a cheap great deal on a 4 star hotel in Posidonia, Syros, areas near the hottest attractions, so you can plan a sightseeing adventure and take advantage of unbeatable discounts in one fell swoop. Whether you’re putting together a serene getaway or want to revel in the most vibrant entertainment district, 4 star Posidonia hotels offer everything your heart desires. ## Frequently asked questions ### What are the best 4-star hotels in Posidonia? ### How much does it cost to stay in a 4-star hotel in Posidonia? > - Search for the lowest price from $363 ### What's the difference between 5-star and 4-star hotels in Posidonia?