Ask a resident what the most iconic structures in town are and they'll likely mention Observatory at Shonandaira. It's one of the first things your eyes will be drawn to when you start exploring.
Situated in Hiratsuka, this modern piece of architecture is worth a visit. But you'll find loads more to check out in this area. Oiso Long Beach, Southern Beach Chigasaki, and Samukawa jinja aren't too far from Shonan Daira Observatory.