Tan-y-Bryn (Ogof)

Distance (km)	Nom	Longueur (m)	Profondeur (m)
33.4	Porth yr Ogof cave	2530	60
52.6	Ogof y Daren Cilau	27000	192
71.1	Rod's Pot	188	45
71.3	Aveline's Hole	67	16
71.3	Sidcot Swallet	200	28
71.5	Goatchurch Cavern	750	55
71.9	Cox's Cave	100	18
72.2	GB Cave	1950	134
72.2	Gough's Cave	2135	190
73.2	Longwood Swallet	1650	175