One of the largest discoveries for British caving in decades.

A giant cave network under the British Dean Forest was recently revealed in a discovery described by The Times as one of the greatest cave exploration achievements in the United Kingdom.

One of the largest discoveries for British caving in decades.

Man's 30-year obsession unearths caves as big as cathedrals under Forest of Dean. Spelunkers chipping away at rocks broke through to find more than 10km of passages, with giant caverns and boulders the size of houses.