Lake Vrana (Croatian: Vransko jezero), in the centre of Cres island, is a fresh water lake, 1.5 kilometres (0.93 mi) wide and about 4.8 kilometres (3.0 mi) long.

[1] It was thought at one time that the water in the lake was linked to some mainland source by underground streams, but it has since been established that in fact it originates from the atmosphere.

It was formed by very heavy tectonic movements along a longitudinal relaxation fault which now contains 220,000,000 cubic metres (7.8×109 cu ft) of fresh water.

The village of Vrana, above the lake, is located 15 kilometres (9.3 mi) south of the town of Cres.

As a result, she was punished by having her castle flooded during a severe thunderstorm which caused Lake Vrana to be created.