Canada's Wonderland, formerly known as Paramount Canada's Wonderland, is a 330-acre (130 ha) amusement park located in Vaughan, Ontario, a municipality within the Greater Toronto Area. Opened in 1981 by the Taft Broadcasting Company and the Great-West Life Assurance Company, it was the first major theme park in Canada and remains the country's largest. Cedar Fair (merged into Six Flags on July 1, 2024) bought the park from Paramount Parks in 2006, and has owned and operated the park since then. In 2019, it was the most visited seasonal amusement park in North America, with an estimated 3.9 million guests. The park still holds this record, with an estimated 3.8 million visitors in 2022 amid the COVID-19 pandemic. Canada's Wonderland normally operates from late April or early May to Labour Day, and then on select dates until early January. Special events are held throughout the season, including Halloween Haunt, WinterFest, and various festivals such as Celebration Canada, a month-long Canada Day festival. Canada's Wonderland has the third-most roller coasters in an amusement park—eighteen as of 2025—behind Energylandia in Poland and Six Flags Magic Mountain in Valencia, California. Twenty acres (8.1 ha) of the park houses a water park named Splash Works. Canada's Wonderland had 20 roller coasters throughout its history with SkyRider being removed and relocated at the end of the 2014 season and Time Warp demolished at the end of the 2024 season. Since the closure of Crystal Beach Park in Fort Erie in 1989, Canada's Wonderland remains the only amusement park in Ontario with wooden roller coasters in operation. Since the closure of Mighty Flyer in Exhibition Place in Toronto in 1992, Canada's Wonderland is the only location in Ontario with wooden roller coasters in operation. Since the closure of all rides in Marineland of Canada in Niagara Falls in 2024, Canada's Wonderland remains the only amusement park in Ontario with roller coasters with inversions in operation.