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
Lake Sevan cultural monument is the Sevanavank monastery located on the peninsula, which was until the mid-20th century an island. Another prominent monastery at the western shore is Hayravank, and further south, in the village of Noratus, is a field of "khachkars", a cemetery with about 900 "khachkars" of different styles. Additional "khachkars" are found at Nerkin Getashen on the south coast. Sevan trout ("Salmo ischchan") is an endemic species of the lake, but it is endangered as some competitors were introduced into the lake, including common whitefish ("Coregonus lavaretus") from Lake Ladoga, goldfish ("Carrasius auratus"), and crayfish ("Astacus leptodactylus"). If the