Lake Voulismeni

Lake Voulismeni is a small, formerly freshwater lake, later connected to the sea, located at the centre of the town of Agios Nikolaos on the Greek island of Crete. It has a circular shape with a diameter of 137 m and a depth of 48.8 m. The locals refer to it as simply "The Lake". The lake is connected to the harbour of the town by a channel dug by soldiers of the French Army in 1907. A panoramic view of the lake can be seen from a small park situated above it.

According to legend, the goddess Athena bathed in it. Every year at midnight turning to Orthodox Christian Easter day, the majority of the population of the town gathers around the lake to celebrate with fireworks, and firecrackers thrown by the people attending the event.The rocks at the lake are limestone breccias, the result of undersea landslides coming down from the mountains to the north-west of the town.

Source: Wikipedia