Tap into your inner culture vulture at Museo del Mare. See if any guided tours are available or ask a museum employee to direct you to the highlights.
This Ischia Porto museum is a good spot to kick off your day of sightseeing. There's loads to enjoy in the vicinity, including Aragonese Castle, Poseidon Thermal Gardens, and Citara Beach. Take your time at Museo del Mare before hitting up these other fine sights.