Atami Castle may look old-school, but it's actually a modern creation from 1959. Built purely for fun and tourism, this castle offers killer views of Sagami Bay from its top floor. You can channel your inner samurai, check out cool ukiyo-e art, and even learn about other castles in Japan while you're there. Plus, it's a primo spot to catch the Atami Marine Fireworks in the summer. So, if you're up for a mix of history and fun times, Atami Castle is where it's at!