Ffynnon Beuno and Cae Gwyn Caves are two Scheduled Ancient Monuments, in Denbighshire, Wales, which are also designated a Site of Special Scientific Interest (SSSI).
The site has two caves, with entrances close to each other high on a valley side, above the Vale of Clwyd.[1] [2] They were first excavated in 1883–5. Human tools have been found on the site dating back to around 36,000 BC, and a mammoth bone has been dated back to 16,000 BC.[3] These very early discoveries were significant in providing one of the first direct associations between stone tools of paleolithic people and the bones of extinct pre-iceage animals such as mammoth and woolly rhinoceros.[4]
In 1963 it was designated as an SSSI for the palaeontological interest described above and for its species interest as a winter roost of lesser horseshoe bat.[4]