Burr Oak, Michigan; Village: Location of Burr Oak with St. Joseph County, Michigan: Coordinates: Coordinates: Country: United States: State: Michigan: County: St. Joseph: Area â¢ Total: 1.00 sq mi (2.59 km 2)
The world's largest underground trampoline was unveiled today in caverns which are twice the size of St Paul's Cathedral. Bounce Below is part of Zip World, an outdoor pursuits centre in Blaenau Ffestiniog, North Wales.
The trampoline bed is rectangular 4.28 by 2.14 metres (14 ft 1 in Ã 7 ft 0 in) in size fitted into the 5.05 by 2.91 metres (17 ft Ã 10 ft) frame with around 110 steel springs (the actual number may vary by manufacturer).