Lake Otchikoto is located in the north of Namibia, 20 kilometers northwest of the city of Tsumeb and 60 kilometers from the Etosha National Park. The diameter of the lake, which has an almost perfect round shape, is 102 meters, its depth is reliably unknown, scientists suggest that it can reach 142-145 meters. Otchikoto is the so-called "failed lake" formed at the site of the failure of the upper part of the giant karst cave, as evidenced by stalactites raised from the bottom of the reservoir, which are more than 80 thousand years old. Translated from the language by Herero, Otchikoto means “deep water”, local residents believed that the lake was bottomless, and its waters irrevocably “absorb” all living things. The first Europeans to discover Lake Otchikoto in 1851 were the Englishman Francis Galton and the Swede Karl Johan Andersson. When the travelers decided to swim in the reservoir, their guides were in indescribable horror - the natives were afraid to even come close to the lake, not to mention swimming in it. In 1915, German troops, who were defeated by the army of the Union of South Africa in a battle near the lake, drowned guns in Lake Otchikoto, a large number of weapons and ammunition, a significant part of which was later raised to the surface by divers. However, several artillery pieces and a lot of ammunition still rest at the bottom of the lake. Rumor has it that the Germans dropped an airtight safe with 6 million goldmarks into Otchikoto - despite an intensive search, they never found it. In 1972, Lake Otchikoto was declared a National Natural Monument by Namibia.