
Llechwedd slate mine in North Wales is home of the world's deepest underground mini-golf course. Scroll through the gallery to see more.

There's only one way into the caves -- a seat on Europe's steepest cable railway.

Some 152 meters (498 feet) down awaits the 18-hole mini-golf course, spread out across four floors.

The course, and various other parts of the mine, are illuminated by striking neon lights.

The caves also house a 930-meter trampoline complex called Bounce Below, three separate tiers connected by a series of slides and ramps.

Bounce Below is situated in a vast area twice the size of St. Paul's Cathedral, suspended 55 meters (180 feet) above the cavern floor.

The site's organizer, Zip World, also runs tours of the Victorian-era mines, which produced thousands of tons of slate during the Industrial Revolution.

An underground traversal course -- The Caverns -- challenges visitors to navigate the twisting caves via rope bridges and tight ropes.

The site also boasts Europe's first multiple zip line, Titan. Topping out at speeds of 114 kilometers (70 miles) per hour, it offers stunning views of the surrounding mountains and quarry some 746 meters (2,450 feet) below.



