Sumela Monastery, Turkey
Located 54 km (34 miles) south of Trabzon, a turkish city at the Black Sea coast, is the Sumela Monastery. Standing at a height of 1200 m (3700 ft), this monastery is perched on a wall-like cliff like an eagles nest. While the four-story facade remains in good condition, the back of the monastery has been largely destroyed.
The monastery is probably built by Emperor Anastasius in the 5th century A.D., which was later, enlarged by Justinian. However, according to another legend, Sumela Monastery Was founded by two Athenian monks.