A mythical snake-like creature lives in the waters of Lake Seljordsvalnet in Norway. The monster measures some 20 meters in length, with a greenish tint and a raised back, and has been terrifying residents of the lake since the 18th century. Recently, an Oslo family sighted the serpent, known as Selma. It fascinates Swedish cryptozoologist Jan Sunberg, who has been using a giant trap to catch it.