Lake Meke is a volcanic crater lake
composed of two nested lakes located in Konya Province, central Turkey. It is a registered natural monument of the country and a Ramsar site.
Lake Meke is located in Karapınar district of Konya Province. It is 9 km away from Karapınar, and 2 km south of the Konya-Adana highway D.330 E 981.It was formed by the flooding of the crater of an extinct volcano, which took shape about 4 million years ago when the volcano erupted. About 9,000 years ago, a second eruption formed another volcanic cone inside the lake with a maar. Lake Meke now consists of two lakes with various islets. It is 800 m long and 500 m wide with a depth of 12 m. The inner lake inside the 50 m-high volcanic cone is 25 m deep, and contains saline water. The volcanic cone island resisted erosion by the harsh weather conditions due to its massive material, and has retained its form for thousands of years.
Wikipedia https://en.wikipedia.org/wiki/Lake_Meke
Coordinates 37°41'13.353" N 33°38'35.551" E