NASA publishes satellite images from the Balkans: Lake Ohrid, world's oldest Prespa

Lake Ohrid and Lake Prespa, two of the oldest lakes in Europe, lie in a mountainous area along the borders of northern Macedonia, Albania and Greece. Lakes have existed for at least a million years and perhaps longer.

Most of the millions of lakes in the world are less than 18,000 years old and were formed when glaciers melted at the end of the Ice Age.

Ohrid is the biggest and deepest of both, with an average depth of 155 meters. Prespa has an average depth of 14 meters.
Geologists classify 30 lakes in the world as oldest, including Ohrid and Prespa.

Much of Ohrid Lake water comes from underwater sources, NASA writes. In a recent study based on nearly four decades of Landsat surveys, scientists reported that Lake Prespa lost 7 percent of its surface and half of its volume between 1984 and 2020, probably because of increased growth in agricultural water.

There are 200 species of species found nowhere else in Lake Ohrid, including unusual snails, ducks and trout.

Ohrid Lake Protected by U NESTO and in some cases it's called “European Galapagos” or a museum of living fossils because of its extraordinary biodiversity.
In 2010, scientists at the International Astronomical Union named Ohrid a lake in Titan.

Article NASA.