They’re all visible around the small town of Blaenau Ffestiniog

They’re all visible around the small town of Blaenau Ffestiniog. Surrounded on all sides by

Snowdonia National Park, its quarry-scarred landscape means it didn't qualify for park status. Yet the area has a hard beauty of its own, and once you head downwards you discover another world. You can explore the Llechwedd Slate Caverns just outside town via numerous tours, and adventurous can spend two hours exploring the eerily magnificent mines on a Caverns tour, using zip lines, rope bridges and footholds hammered into the walls, gazing into dark holes and across cathedral-sized caves. It’s a great feeling – you get to put your hands on history, and set your heart pounding. If that sounds a bit much, operators Zip World also offer Bounce Below, a series of enormous interconnected trampolines and slides. Trampolining in a cave is a unique experience, and the atmospheric lighting and chiselled walls around you give the giggling fun of bouncing up and down a nice counterpoint.