Blue Lake

The Turquoise Surprise of the Black Sea

In the Dereli district of Giresun, nestled amid lush green forests, lies a mesmerizing place: Blue Lake. This site is formed by the convergence of three lakes, and locals refer to it as “Sodalı Göl” or “Göğ Göl”. What makes it special? Its water changes color—sometimes blue, sometimes turquoise—depending on the time of year!

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Why So Blue?

The lake’s striking color is caused by limestone deposits and Göksu Creek, the only soda-rich stream in the Black Sea region. In late May, as snow begins to melt, the lake takes on a greenish hue. After early July, however, its color transforms completely into turquoise. This unique phenomenon makes the lake a destination unlike any other for nature enthusiasts and photographers alike.

Within Kuzalan Nature Park

Blue Lake is located within the boundaries of Kuzalan Nature Park, which was designated a nature park in 2013 and covers a vast area of 482 hectares. The park also features travertines reminiscent of Pamukkale. The Dikoluk Spring and Marazlı Hill, both at an elevation of 1,800 meters, offer panoramic views of the surrounding landscape.

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The Secret of Göksu Creek

Göksu Creek forms five lakes as it flows westward from its confluence with Aksu Creek. The largest of these lakes has a diameter of 30 meters. The soda content of the water gives the surrounding vegetation and rocks a distinctive appearance.