Hidden 100 feet below the Earth’s surface is a one-of-a-kind playground for the explorer in all of us.

Here in the United Kingdom’s North Wales you’ll find Bounce Below, an underground cavern covered in lights with trampoline-like nets and slides.

The giant bouncy nets are hung in two huge chambers, linked by slides and walkways.

No one is allowed on the old mining train to get to the 176-year-old cave without putting on a helmet first.

The best thing about it? This playground doesn’t get rained out, so it’s open year round!

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