The massive outline of the Frankish castle (Frangokástele) is visible from afar; it was built in 1371 by the Venetians as a defence against pirates, Turks and insurgent Sfakiots. It is rectangular in plan with crenellated walls and a square tower at each corner, one of which was reinforced to form the keep. It surveys the empty sea as if it were at the ends of the earth (during the low season at any rate). Over the sea gate the lion of St Mark looks down on the remains of the deserted harbour next to a fine sandy beach.