The Downsview Park Sports Centre is a 45,000-square-metre (485,000-square-feet) multi-purpose facility, formerly an aircraft hangar for the de Havilland Aircraft Company and later the Canadian Forces. Downsview Park's most regular attraction is The Hangar, an indoor recreational facility within the Downsview Park Sports Centre, which accommodates approximately 600,000 visitors per year to its soccer, ball hockey and beach volleyball facilities alone. Winter 2011 saw the welcome addition of a domed field, expanding winter field availability. During the summer of 2009, Toronto Roller Derby started playing their home games at Downsview, using a space in the Downsview Park Sports Centre's west end. In the summer of 2011, Toronto Roller Derby moved to another space in the Park known as The Bunker, and hosted the inaugural Roller Derby World Cup in that space in early December 2011. The Downsview Park Sports Centre also accommodates Grand Prix Kartways indoor electric go-karting (aka green go-karting), the HoopDome basketball facility, The Rail Skatepark skateboard destination, True North Climbing indoor rock climbing gym and Blyth Academy Downsview Park School for Elite Athletes. The National Squash Academy, operated by former World #1 player Jonathon Power is a recent addition to the Sports Centre. In October 2013 an ice hockey arena was opened, and was renamed in February 2015 to Scotiabank Pond.