Wunderland Kalkar is an amusement park in Kalkar, North Rhine-Westphalia, Germany. It is built on the former site of SNR-300, a nuclear power plant that never went online because of construction problems and protests. The park was constructed by Dutch entrepreneur Hennie van der Most, who purchased the site for a rumored price of US$3 million. Wunderland Kalkar receives around 600,000 visitors each year.