Careful you don't hit your head! World's largest underground trampoline to open in enormous cavern at Welsh slate mine

New attraction to open this summer gives visitors the chance to bounce on huge trampolines suspended underground

The trampolines are hung in cavern twice the size of St Paul's Cathedral and are accompanied by huge light show

Visitors will be given overalls and helmet and use a train to travel inside the mountain for the one-hour experience






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. As part of their latest attraction, staff have transformed a slate cavern by installing three giant trampolines.

The trampolines are reached by train, with each linked by a 60ft long slide. It is thought to be the first facility of its kind, with the trampolines open to the public from July 3.



Huge suspended trampolines are to become a new tourist attraction in Llechwedd Slate Caverns, Gwynedd, Wales when they open later this summer

Visitors will be able to enjoy a light show while they bounce on the huge trampolines, linked by a 60ft slide which spirals down to the underground space



The colourfully-lit caverns are the latest attraction at the regeneration project, which has seen more than £1 million invested in it so far.



Sean Taylor, owner of Zip World, said: 'We got the idea when my business partner saw this done in woods in France but this has never been done in a cavern, this really is a world first in Wales.



'It's a one hour activity where customers get dressed up in a cotton overall and given a helmet, they then jump on a train and travel inside the mountain.

'There are three giant trampolines with three metre net walls to stop people climbing out. Each is linked by a slide to go down and a walkway to go up - the biggest slide is 60ft.'

Workers preparing the attraction had to work using portable lamps and carried out around 500 tons of rubble from the cavern.

Business development manager Laura Jones told The Daily Post: 'The first trampoline is 20ft off the ground, the second is 60ft and the third is 180ft high. They are connected by shoots and you get in via a walk way in to the middle trampoline.

'Each trampoline is about 60ft wide. They've been tested to hold a huge weight.'

The huge play-area, expected to be a massive hit with kids, is built into an underground vault which is twice the size of St Paul's Cathedral

Visitors will be given a helmet and a protective overall before they travel down to the site in a specially-built train, organisers have said