Mamure Castle

It's not known when the original castle was built, but the Romans, Byzantines, Crusaders, Karamanids and Ottomans all reckoned it was worth keeping in good repair against seaborne attack. It has stout walls, with a moat on the landward side. You enter from the east into the inner courtyard. A high internal wall separates this from the outer castle, where the only intact building is a mosque from 1300. The inner castle perches on rocks to the south. The towers and walls are unsafe and you're not supposed to climb them but many visitors do.