Hankensbüttel Otter Centre

The Hankensbüttel Otter Centre is a nature experience centre in Hankensbüttel, in the German district of Gifhorn, that is laid out in 6 hectares of open land by a lake known as the Isenhagener See. The Otter Centre showcases the European otter which is a species threatened by extinction, as well as several related species of marten, in a natural environment. The centre is run by the Aktion Fischotterschutz, a state-recognised nature conservation organisation, and is a popular tourist and visitor destination on the southern edge of the Lüneburg Heath.

Source: Wikipedia