The sea fortress built in the 16th century on the island of Spinalonga in the Mediterranean Sea, Crete, Greece, Europe

16th c 16th century balkan peninsula balkans balkan buildings building castell castelo castles castle crete defence works defence work defensive fortification defensive work deserted empty europe famous place fortifications fortification fortresses fortress greece greek historical historic islands island kriti mediterranean sea mediterranean nobody no one no people place of interest sea fortress sea sights sight sixteenth century southeastern europe southeast europe southern europe south europe structure the 1500s tourist attractions tourist attraction travel photography uninhabited