Major cave systems have developed over the past million years or so such as those at Ogof Ffynnon Ddu and Llygad Llwchwr. There are large numbers of smaller caves and potholes dotted around the Carboniferous Limestone belt which runs east-west through the Geopark.
Porth yr Ogof (pictured here) is a great spot for visitors to peer into the open mouth of one of Britain’s largest cave entrances – and one which swallows an entire river, the Afon Mellte.
It is especially popular with educational and youth groups. But please remember that in common with other adventure sports, caving can be hazardous, especially for those without experience or the proper equipment.
If you do want to go underground, consider joining a local caving club or booking on a caving course with a local adventure sports provider.
Enjoy exploring beneath the Geopark – remember to follow the caving code to safeguard both yourself and the cave systems.