The Cheesepress.

Took some pupils caving in the Yorkshire Dales. Fantastic bunch. One lad in particular impressed me a huge amount with his "I want to have a go at that" attitude. Even more impressive when you consider the fact that they have low self esteem and low confidence levels.
This is the cheesepress. Basically a long, narrow gap between two huge slabs of rock. In fact, the gap is so narrow you have to take your helmet off to fit through. If you ask me this would terrify most people.