Thorpe Park is a theme park located between the towns of Chertsey and Staines-upon-Thames in Surrey, England. It is operated and owned by Merlin Entertainments. After demolition of the Thorpe Park Estate in the 1930s, the site became a gravel pit. Thorpe Park Resort was built in the 1970s on the gravel pit which was partially flooded, creating a water-based theme for the park. This essentially allows guests to view the park as an island, which is where the park's current "island like no other" slogan originates from. It was officially opened to the public by the late Lord Louis Mountbatten in 1979. It has since grown into one of the major theme parks in the UK and now also features a hotel. Major attractions include a large water ride Tidal Wave, a number of rollercoasters including Colossus, Nemesis Inferno, Stealth, Saw – The Ride, The Swarm, The Walking Dead: The Ride and dark ride Derren Brown's Ghost Train. Other smaller attractions include a water area called Amity Beach, a walkthrough attraction based on I’m a Celebrity...Get Me Out of Here! and an Angry Birds themed land.