Dan yr Ogof is arguably the foremost showcave complex in the British Isles, a tasteful development which includes three separate, and quite different, underground experiences. But beyond the public limits lie many, many kilometres of passages and caverns of unimaginable beauty.
This superbly illustrated book includes many excellent colour images but also a wealth of little known archival material; it is a classic account of cave exploration in South Wales, which takes its beginnings from the early years of the century. (Unbelievable value for money!)
Second Edition published November 2018 – available here