Located in the Opukske Reserve, in the Kerch outskirts, Lake Koyashske is one of the inimitable wonders of Crimean Peninsula. There are several unique characteristics for which the lake stands out. Lake Koyashske is considered to be the saltiest in Crimea – a liter of its water contains 350 grams of salt. Therefore, the locals were used to extract this popular mineral here. But the lake’s main highlight is its changing-colour properties that depend on the season. So when it's hot, the water is pink-coloured – creating fantastic scenery it sharply contrasts with the white shores and blue buzzing waters of the Black Sea. The main reason for such an unusual colour of the lake is the microscopic algae that live there. They contain a special scarlet pigment in its structure that gives water such a characteristic color. The other reason of lake’s red colour is brine shrimps that also live here. https://discover-ukraine.info/places/crimea/kerch/2570