- Lake Tana, Lake Tsana ⇒ a lake in NW Ethiopia, on a plateau 1800 m (6000 ft) high: the largest lake of Ethiopia; source of the Blue Nile. Area: 3673 sq km (1418 sq miles)
- a river in E Kenya, rising in the Aberdare Range and flowing in a wide curve east to the Indian Ocean: the longest river in Kenya. Length: 708 km (440 miles)
- a river in NE Norway, flowing generally northeast as part of the border between Norway and Finland to the Arctic Ocean by Tana Fjord. Length: about 320 km (200 miles)
Finnish name: Teno