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Deep Sleep is an adventure like no other on Earth! This newest epic experience from Go Below Underground Adventures leads you down through an abandoned Victorian Slate Mine to a remote off-grid adventure camp, a staggering 1,375 feet below the mountains of Snowdonia! This is the deepest underground sleep on the planet...by far.

In the Deep Sleep chamber you’ll find four cosy Cabins and a spectacular Grotto room carved into the bare rock face. Where glamping comfort meets raw adventure, your personally guided journey will show you the wonders of Wales’ slate mining history to discover the world’s deepest sleep.