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Uchan-su (Ukrainian: Учан-Су, Russian: Уча́н-Су Crimean Tatar: Uçan Suv), is a waterfall on the river Uchan-su on the southern slopes of the Crimean Mountains in Crimea. The name translates from the Crimean Tatar language for flying water.Uchan-su, the highest waterfall in Crimea, is a popular tourist attraction located 7 km from the city of Yalta halfway to Ai-Petri Mountain.

Kuibysheve (Ukrainian: Куйбишеве; Russian: Куйбышево) is a rural settlement in the Yalta Municipality of the Autonomous Republic of Crimea, a territory recognized by a majority of countries as part of Ukraine and annexed by Russia as the Republic of Crimea.In 1928, the settlement was known as the Isar village (Crimean Tatar: İsar), belonging to the Ay Vasil Settlement Council of the Yalta Raion.