Wales

13th November 2014 45 mins Season 1 Episode 4

Rob visits Europe's largest cave system underneath Brecon Beacon national park, the dungeons of Chirk castle and explores the hidden remains of Ruthin castle. He also abseils down a cliff in the Gower Peninsula to a cave reputed to contain the bones of a prehistoric prostitute.

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Season 1 · Episode 5

Central England

Under the city of Nottingham Rob explores the largest system of man-made caves in the country, before uncovering a bloody secret below a humble back garden. In Norfolk he learns about Britain's first industry that was established 5,000 years ago and he also explores an 18th Century den of debauchery below ground level in Buckinghamshire.

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