Bounce Below is the world's largest underground trampoline, bounce and slide facility; set to open to the general pubic on 4 July 2014. A set of three enormous trampolines within the Llechwedd caverns in Wales brings trampolining to a whole new terrain. The old mining cavern is twice the size of St. Paul's Cathedral.
The activity lasts approximately one-hour and visitors are supplied with cotton overalls and safety helmets before jumping on the train and taken inside the mountain. The train disembarks customers into a cavern lit up by an incredible display of lights. The three trampolines are interconnected by stairways and slides, the biggest of which is 60 feet long.
