These caves are all in the Alyn gorge area near Cilcain, and are dry(ish) and therefore accessible as a direct result of the Milwr tunnel lowering the water table in the area.
South Wales as a fabulous amount of decent caving in and around the Brecon Beacons and the Black Mountains. A characteristic feature of South Wales Caves is that the formation is generally on a horizontal plane, so you don't need to lug lots of climbing gear around with you.
My favourite caves are listed here.
- Lygad Lwchwr
- Little Neath River Cave
- Porth-yr-Ogof (Ystradfellte)
- White Lady / Bridge Cave / Town Drain
- Daren Cilau - this is hard
- Ogof Crawnon - incase Daren Cilau isn't masochistic enough
Yorkshire caves are characterised by the huge vertical distances covered, and the technical skills and equipment required to explore them. Hence the name 'potholes'.
Some of my favourite ones are listed here
- Upper / Lower Long Churn and Alum Pot
- Great Douk
- Three Counties system (Lancaster Hole to Wretched Rabbit)
- Calf Holes / Browgill
- Sell Gill