Efteni Lake is one of the nicest lakes of Turkish landscape. It is located on Duzce plain. It is one of the important stops for immigrant birds. Also its legend is very popular. It has a muddy structure.

The Byzantian army had a stop on the shore of the lake during a military campaign. Princess Eftalia was with the army. But she had bad injures on her face. She poured that muddy and she started to be fine. Also she became more beautiful. So the Byzantian emperor decided to build a thermal spring here. She fell in love with a boy on the other shore of the lake which was the Ottoman country. She was sailing across the lake to meet him. But her boat sank and she passed away here. So it became the lake of Princess Eftalia….

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