Kernie's Familienpark is part of the Wunderland Kalkar resort.
Kernie's Familienpark is built on the land of a never completed atomic power plant. The atomic power plant project was canceled early enough that no radioactive material was ever brought onto the site. The cooling tower (the cylindrical shape you see of many atomic power plants) was built and is now used as a rock climbing wall.
The music video for the song 'Nimmerland' by German group 'Captain Disko' was filmed at Kernie's Familienpark.