Lake Peipus the town. Near Kallaste, there is one of the largest surfacings of Devonian sandstone with a length of and a maximum height of , as well as several caves and one of the largest colonies of swallows in Estonia. 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
Onega, Russia of Onezhsky District, even though it is not a part of it. As an administrative division, it is, together with three rural localities, incorporated separately as the town of oblast significance of Onega—an administrative unit with the status equal to that of the districts. As a municipal division, the town of oblast significance of Onega is incorporated within Onezhsky Municipal District as Onezhskoye Urban Settlement. The economy of the town is based on timber industry. There is also production of construction materials. Onega is a minor port on a bay on the White Sea, which routinely freezes in winter. The