Hidden Realms by Martyn Farr showcases 100 of the most outstanding caves, potholes and mines across the UK and Ireland. Martyn is one of the world’s most respected cavers, and he has been at the forefront of cave exploration in the UK and further afield for decades. Throughout Hidden Realms he combines his experience and passion for caving to present his favourite subterranean sites – the best of the best in the UK and Ireland. This is an explorer’s-eye view of the most secret and wild places in the British Isles. Many of the most highly rated and classic caves and mines are here...