Thorpe Park is a theme park in Chertsey, Surrey, England, UK. After demolition of the Thorpe Park Estate in the 1930s, the site became a gravel pit. Thorpe Park was built in 1979 on the gravel pit which was partially flooded, creating a water-based theme for the park. The park’s first large roller coaster, Colossus, was added in 2002. In 2007, Tussauds was bought out by Merlin Entertainments, who now operate the park on a lease from Nick Leslau. In 2011 Thorpe Park had 1.9 million visitors making it the joined 2nd most popular theme park in the United Kingdom alongside Legoland Windsor, but trailing Alton Towers which had 2.6m guests. Thorpe Park is the 10th most visited theme park in Europe.