Originally built on 3 levels (with each level assigned to a different Grand Master), used to be a key fortress for the knights from the order of Saint John. The hill-top fortress provides breath-taking views of its surroundings because it's set 131 metres high. The climb up to the castle isn't very difficult.
Wikipedia https://en.wikipedia.org/wiki/Kritinia
Address Rodou-Apolakkias, 85108 Atavyros, Greece
Coordinates 36°15'50.84" N 27°48'32.02" E