Documentary series. In this episode, Rob explores two natural wonders in the Yorkshire Dales - a mile of caves and one of Britain's deepest potholes. (S1 Ep 3)[AD,S]
Documentary series in which engineer Rob Bell explores the subterranean world beneath our feet. In Scotland, he discovers the gruesome secrets of an ancient cave. (S1 Ep 1)[AD,S]
Southern England: Last in the documentary series. In this episode, Rob explores a cave system that altered Victorian Britain's view of human history before entering a once top-secret bunker. ...[AD,S]