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Skocjan Caves in Slovenia (One of the largest underground canyons in the world with the Reka river still carving through it)

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from Adventures Of Adam

Underground Cave Tuff Spot

U is for Underground Cave Tuff Spot Stand Create an Underground Cave with lights and insects | http://adventuresofadam.co.uk/underground-cave-tuff-spot/

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Bottom of Gaping Gill, Yorkshire. Britain's highest unbroken waterfall plunges 328 ft into Gaping Gill, one of Britain's largest and most complex cave systems.

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Beneath Nottingham Castle, there is a labyrinth of man-made sandstone caves and tunnels that are strongly related to the famous legends of Robin Hood, who was said to use them to escape the Sherriff of Nottingham. Now you can go deeper into Nottingham’s network of man-made caves than ever before, thanks to the brand new Nottingham Caves App.

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Glimerton Cove, Edinburgh -a subterranean complex of passageways and chambers carved out of the sandstone bedrock on which this part of Gilmerton stands. Our tips for things to do in Edinburgh: http://www.europealacarte.co.uk/blog/2011/12/19/edinburgh-tips

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Wookey Hole caves , near Wells Somerset, England. Everyone should visit these caves, breathtaking!

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from Telegraph.co.uk

Amazing caves of giant crystals inside the Naica Mine in Chihuahua, Mexico

Cave of Crystals, Naica Mine, Mexico- one of the most extraordinary places on Earth!

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from Express.co.uk

World's top 10 jaw-dropping caves

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