Atami Castle (熱海城, Atamijō) was built as a tourist attraction in 1959 on a mountaintop overlooking Atami despite the fact that the city historically never had such a castle. The touristy concrete complex houses an exhibition about the different castles of Japan. Visitors can also dress up in Edo Period costumes and try solving Japanese riddles. A game center and erotic ukiyo-e exhibition is located in the building's basement.
Atami Castle stands 100 meters above sea level, and its top floor offers panoramic views over Atami and Sagami Bay. The castle grounds are a popular spot to see cherry blossoms typically around late March and early April, and fireworks which are held on about a dozen days spread across the year, particularly during the summer holidays. A trick art museum stands next to the castle