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Giant trampolines inside a mammoth slate quarry cavern are the latest tourist attraction tipped to bring thousands of thrill seeking tourists to the region.

Bounce Below will open next month at Llechwedd in Blaenau Ffestiniog – the world’s first facility of this kind. The caverns, twice the size of St Paul’s Cathedral, will be lit up in a light show while visitors bounce on giant trampolines linked by a 60ft long slide. People will be delivered to the deep attraction by train.

WATCH: Bounce Below's giant trampolines launch at Blaenau Ffestiniog

The launch, which bosses hope will be done by British gymnastics star Beth Tweddle, follows the unveiling last week at the quarry of Zip World Titan – the largest zip line course in the world. In total £1.2m has been invested at the site.

Read Laura Swire's review of Zip World Titan & watch her take the plunge

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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.”

Behind the scenes: Have a look at how the giant trampolines were constructed inside the slate mines

The new development will create 10 jobs with roles for train drivers and instructors, and there are further plans for a series of underground zip lines.

Zip World, which also owns Zip World Velocity at Penrhyn Quarry, Bethesda, is ooking at further zip sites in the UK and around the world, including one in a former South Wales quarry, South Africa and the Caribbean.

North Wales is notching up an impressive list of outdoor adventure activities and attractions and to make things easy, we've compiled this essential guide to help you navigate them.

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Sean Taylor, owner of Zip World, answers your questions