Lake Peipus Lake Peipus Lake Peipus (; ; ) is the largest transboundary lake in Europe, lies on the border between Estonia and Russia. The lake is the fifth-largest in Europe after Lake Ladoga and Lake Onega (in Russia north of St. Petersburg), Lake Vänern (in Sweden), and Lake Saimaa (in Finland). Lake Peipus represents a remnant of a body of water which existed in this area during an Ice Age. It covers , and has an average depth of , the deepest point being . The lake has several islands and consists of 3 parts: The lake is used for fishing
Kartsakhi Lake Kartsakhi Lake Kartsakhi Lake (Georgian: კარწახის ტბა, "karts'akhis tba"), or Lake Khozapini (, "khozap'inis tba"; Turkish: "Hazapin Gölü"), or Lake Aktaş (), is a soda lake in the Caucasus Mountains. It sits on the international border between Georgia (53%) and Turkey (47%). It is the second largest lake in Georgia, covering an area of 26.3 or 26.6 square kilometres at an altitude of 1799 m. It is fed by a number of creeks. During the rainy season its excess water discharges to Kura River.An important bird habitat, it holds one of the largest populations of Eurasian eagle-owl in the country,