This is a stunning photographic celebration of the deepest and most challenging caves in the UK. With images from world-class photographers and writing from the original discoverers and explorers, the reader is taken on a remarkable journey through this beautiful and dramatic Welsh cave system. the book also includes first-hand accounts of the epic 52-hour 2021 rescue as well as articles on geomorphology, conservation and cave life.
 "Ogof Ffynnon Ddu - The Cave of the Black Spring")
