| Site | Access | Suggested Equipment |
| Afon Meirchion Cave (lower) (https://www.ucet.org.uk/index.php?topic=430.0) | Open | None |
| Afon Meirchion Cave (upper) (https://www.ucet.org.uk/index.php?topic=643.0) | Open | None |
| Anglesey's Sea Caves (https://www.ucet.org.uk/index.php?topic=645.0) | Open | None |
| Bala Mine (https://www.ucet.org.uk/index.php?topic=342.0) | Open | None |
| Belgrave Mine (https://www.ucet.org.uk/index.php?topic=649.0) | Open | None |
| Benglog Copper Mine (https://www.ucet.org.uk/index.php?topic=476.0) | Open, open stopes, | None |
| Betws Garmon Mine (https://www.ucet.org.uk/index.php?topic=658.0) | Open | None |
| Big Covert Cave (https://www.ucet.org.uk/index.php?topic=663.0) | Open | None |
| Brasgyll Caves (https://www.ucet.org.uk/index.php?topic=666.0) | Landowner permission | Ladders/SRT - site dependant |
| Britannia Mine (Snowdon) (https://www.ucet.org.uk/index.php?topic=670.0) | Some open, some not | None |
| Bryn Celyn Adit (https://www.ucet.org.uk/index.php?topic=366.0) | Open | None |
| Bryn Felin Mine (https://www.ucet.org.uk/index.php?topic=676.0) | Open | None (SRT for shaft) |
| Bryn Glas Mine, Llan Ffestiniog (https://www.ucet.org.uk/index.php?topic=1352.0) | Open | None |
| Bryn Nantllech Adits (https://www.ucet.org.uk/index.php?topic=678.0) | Open | None |
| Burley Hill Adit (https://www.ucet.org.uk/index.php?topic=680.0) | Partly blocked | None |
| Bwlch y Plwm Mine (https://www.ucet.org.uk/index.php?topic=683.0) | Open | None (SRT optional) |
| Cabin Shaft (Minera) (https://www.ucet.org.uk/index.php?topic=687.0) | Open | Ladder/SRT |
| Cae Coch Sulphur Mine (https://www.ucet.org.uk/index.php?topic=11894.0) | Open | None |
| Cae'r Defaid Mine (https://www.ucet.org.uk/index.php?topic=473.0) | Open | None (dingy/wetsuit for deep drainage) |
| Caerwys Caves (https://www.ucet.org.uk/index.php?topic=698.0) | Landowner permission | None |
| Cambrian Slate Mine (https://www.ucet.org.uk/index.php?topic=4054.0) | Open | None |
| Castell Cawr Caves (https://www.ucet.org.uk/index.php?topic=700.0) | Some open, some locked | None |
| Cefn Caves (https://www.ucet.org.uk/index.php?topic=703.0) | Landowner permission | None |
| Chwarel llew Twrog (https://www.ucet.org.uk/index.php?topic=2368.0) | Open | None |
| Cilcain Bridge Rising (https://www.ucet.org.uk/index.php?topic=705.0) | Open | Diving gear |
| Cloddfa Gwanas Mine (Mid Wales) (https://www.ucet.org.uk/index.php?topic=539.0) | Open | None |
| Clogwyn y Fuwch Mine (Conway Valley) (https://www.ucet.org.uk/index.php?topic=707.0) | Open | None |
| Coed Mawr Mine (https://www.ucet.org.uk/index.php?topic=713.0) | Open | Ladders/SRT |
| Coed Mawr Pool Deep Adit (https://www.ucet.org.uk/index.php?topic=715.0) | Open - NRW land | None (boat) |
| Coed Nant Gain Caves (https://www.ucet.org.uk/index.php?topic=717.0) | Landowner permission (now deceased) - avoid | None |
| Conglog Mine (https://www.ucet.org.uk/index.php?topic=719.0) | Open | None |
| Conwy Mine (https://www.ucet.org.uk/index.php?topic=3680.0) | Open | None |
| Corsham Bathstone Quarries (https://www.ucet.org.uk/index.php?topic=8041.0) | Unknown | Unknown |
| Cribb ddu mine (https://www.ucet.org.uk/index.php?topic=721.0) | Open (undocumented) | None |
| Croesor Rhosydd (https://www.ucet.org.uk/index.php?topic=131.0) | Open | Lots! |
| Cwm Bychan Mine (https://www.ucet.org.uk/index.php?topic=723.0) | Open | None |
| Cwm Cynfal Copper Mine (https://www.ucet.org.uk/index.php?topic=2199.0) | Open | None (poss SRT) |
| Cwm Mine (St. Asaph) (https://www.ucet.org.uk/index.php?topic=725.0) | Open | Wetsuit |
| Cwmfron Mine (https://www.ucet.org.uk/index.php?topic=728.0) | Landowners permission | None |
| Cwmorthin Alleged Gold Trials (https://www.ucet.org.uk/index.php?topic=730.0) | Open | None |
| Cwmorthin Mine (https://www.ucet.org.uk/index.php?topic=734.0) | Locked - key available | None |
| Cwt-y-Bugail (old) Quarry (https://www.ucet.org.uk/index.php?topic=1369.0) | Believed to be open | None |
| Cyffty Mine (https://www.ucet.org.uk/index.php?topic=741.0) | No underground access ?n | None |
| Denbigh Castle Cave (https://www.ucet.org.uk/index.php?topic=743.0) | Open | None |
| Devil's Gorge Caves (https://www.ucet.org.uk/index.php?topic=745.0) | Open | None |
| Devil's Gorge Mines (https://www.ucet.org.uk/index.php?topic=753.0) | Open | None |
| Dolben Mine (https://www.ucet.org.uk/index.php?topic=760.0) | Open | None |
| Drws y Coed Mine (https://www.ucet.org.uk/index.php?topic=6667.0) | Open | None |
| Dylife Mine (https://www.ucet.org.uk/index.php?topic=763.0) | Open | None |
| Dyserth Castle Cave (https://www.ucet.org.uk/index.php?topic=765.0) | Open | None |
| Dyserth Waterfall Mine (https://www.ucet.org.uk/index.php?topic=767.0) | Open | None |
| Figra Gold Mine (https://www.ucet.org.uk/index.php?topic=781.0) | Open | None (Ladders/SRT optional) |
| Fish Mine (https://www.ucet.org.uk/index.php?topic=784.0) | Open | None (SRT optional) |
| Foel Gron Mine (https://www.ucet.org.uk/index.php?topic=789.0) | Open | None |
| Foel Ispri Gold Trial (https://www.ucet.org.uk/index.php?topic=1150.0) | Locked | None |
| Fron-boeth slate mine (https://www.ucet.org.uk/index.php?topic=3386.0) | Open | None |
| Garegog Mine (https://www.ucet.org.uk/index.php?topic=791.0) | Open | None |
| Geirionydd Mine (Trefriw) (https://www.ucet.org.uk/index.php?topic=793.0) | Open | None |
| Geirionydd Shafts (Trefriw) (https://www.ucet.org.uk/index.php?topic=795.0) | Open | None (handline if needed) |
| Gerdden Isa Adit (https://www.ucet.org.uk/index.php?topic=797.0) | Open | None |
| Gop Caves (https://www.ucet.org.uk/index.php?topic=799.0) | Open | None |
| Gors mine (https://www.ucet.org.uk/index.php?topic=3693.0) | Open | None |
| Grand Turk Passage (https://www.ucet.org.uk/index.php?topic=6635.0) | Open | Ladders/SRT |
| Great Orme Bronze Age Mines (https://www.ucet.org.uk/index.php?topic=807.0) | Open | None |
| Great Orme Cave (Bears Cave) (https://www.ucet.org.uk/index.php?topic=810.0) | Open | None |
| Great Orme Cave (Elephant Cave) (https://www.ucet.org.uk/index.php?topic=812.0) | Open | None |
| Great Orme Cave (Sheep Cave) (https://www.ucet.org.uk/index.php?topic=814.0) | Open | None |
| Great Orme Sea Caves (https://www.ucet.org.uk/index.php?topic=816.0) | Open | None |
| Gwaenysgor Cave (https://www.ucet.org.uk/index.php?topic=818.0) | Open | None |
| Gwaenysgor Mine (https://www.ucet.org.uk/index.php?topic=820.0) | Open | None |
| Gwyrch Castle Adit (https://www.ucet.org.uk/index.php?topic=824.0) | Unknown - permission may be required | None |
| Hafod Boeth Lead Mine (https://www.ucet.org.uk/index.php?topic=1568.0) | Open | None |
| Hafod Y Llan Mine (https://www.ucet.org.uk/index.php?topic=830.0) | Open (undocumented) | None |
| Hafod Y Porth Mine (https://www.ucet.org.uk/index.php?topic=826.0) | Open | None |
| Hendre Ddu Mine (https://www.ucet.org.uk/index.php?topic=832.0) | Open | None |
| Henfwlch Mixed Mine (https://www.ucet.org.uk/index.php?topic=6598.0) | Open | None (SRT optional) |
| Holme Bank Chert Mine (https://www.ucet.org.uk/index.php?topic=8515.0) | Landowner permission BCA insurance + donation | None |
| Holy Island Caves (https://www.ucet.org.uk/index.php?topic=834.0) | Open | None |
| Holywell Shafts (1) (https://www.ucet.org.uk/index.php?topic=382.0) | Open | None |
| Holywell Shafts (2) (https://www.ucet.org.uk/index.php?topic=380.0) | Open | None |
| Klondyke Lead Mine (https://www.ucet.org.uk/index.php?topic=838.0) | Open | None |
| Lady Bagot's Cave (https://www.ucet.org.uk/index.php?topic=843.0) | Open | None |
| Lady Bagot's Mine (https://www.ucet.org.uk/index.php?topic=845.0) | Open | None |
| Little Orme Caves (https://www.ucet.org.uk/index.php?topic=847.0) | Open | None |
| Llanelltyd/Foel Ispri Mine (https://www.ucet.org.uk/index.php?topic=853.0) | Somw open, some locked | None |
| Llanfair TH Mine (https://www.ucet.org.uk/index.php?topic=857.0) | Open | None |
| Llanfairfechan Mine (https://www.ucet.org.uk/index.php?topic=859.0) | Open | None |
| Llanfwrog Woods Mine (https://www.ucet.org.uk/index.php?topic=861.0) | Open | None |
| Llanrwst Mine (https://www.ucet.org.uk/index.php?topic=863.0) | Open | None |
| Llanymynech Cave & Roman Mine (https://www.ucet.org.uk/index.php?topic=865.0) | Open | None |
| liwedd Mine (https://www.ucet.org.uk/index.php?topic=867.0) | Open | None (SRT optional) |
| Llyn y Pandy Adit (https://www.ucet.org.uk/index.php?topic=371.0) | Open | None |
| Llynau Gamallt Mine (https://www.ucet.org.uk/index.php?topic=802.0) | Open | None |
| Menai Straits Adit (https://www.ucet.org.uk/index.php?topic=870.0) | Open | None |
| Millenium Pot (https://www.ucet.org.uk/index.php?topic=872.0) | Open | None |
| Minera Mountain Shakeholes (https://www.ucet.org.uk/index.php?topic=873.0) | Open | Ladders or SRT |
| Minllyd Mine (https://www.ucet.org.uk/index.php?topic=876.0) | Open | None (SRT optional) |
| Moel Fferna Mine (https://www.ucet.org.uk/index.php?topic=879.0) | Open | Ladders or SRT |
| Moel Hebog Mine (https://www.ucet.org.uk/index.php?topic=883.0) | Open | None |
| Moel Mochowgryn Mine (https://www.ucet.org.uk/index.php?topic=2427.0) | Open | None |
| Moelwyn Zinc Mine (https://www.ucet.org.uk/index.php?topic=2556.0) | Some sealed,some open | None (optional SRT) |
| Murphy's Pot (https://www.ucet.org.uk/index.php?topic=885.0) | Locked - contact UCET | None |
| Nadolig Mine #1 (Cilcain) (https://www.ucet.org.uk/index.php?topic=889.0) | Open | None |
| Nadolig Shaft #1 (Cilcain) (https://www.ucet.org.uk/index.php?topic=891.0) | Open | SRT |
| Nadolig Shaft #2 (Cilcain) (https://www.ucet.org.uk/index.php?topic=893.0) | Open | SRT |
| Nant Manganese Mine (https://www.ucet.org.uk/index.php?topic=8435.0) | Open | None |
| Ochr y Craig Mine (https://www.ucet.org.uk/index.php?topic=894.0) | Open | None |
| Ogof Hen Ddyn (https://www.ucet.org.uk/index.php?topic=11950.0) | Open | Hardline |
| Ogof Hen Ffynnonau (Poachers Cave) (https://www.ucet.org.uk/index.php?topic=896.0) | Open | Ladder |
| Ogof Hesp Alyn (https://www.ucet.org.uk/index.php?topic=900.0) | Open | Ladders and SRT |
| Ogof Malwen (https://www.ucet.org.uk/index.php?topic=11952.0) | Open | None |
| Ogof Nadolig (Christmas cave) (https://www.ucet.org.uk/index.php?topic=903.0) | Open | None (Ladders optional) |
| Old Man Mine Moss Head Slate Quarry (Cumbria) (https://www.ucet.org.uk/index.php?topic=906.0) | Open | None (SRT optional) |
| Orange Leete Level (https://www.ucet.org.uk/index.php?topic=908.0) | Open | None |
| Penarth Mine (https://www.ucet.org.uk/index.php?topic=910.0) | Open | None |
| Pengwern Mine (https://www.ucet.org.uk/index.php?topic=913.0) | Open | None (some parts inaccessible) |
| Penyffridd Slate Mine (https://www.ucet.org.uk/index.php?topic=1406.0) | Open | None |
| Porth Nannerch Quarry Mine (https://www.ucet.org.uk/index.php?topic=915.0) | Open | None for one, Ladder for other |
| Portmeirion Caves (https://www.ucet.org.uk/index.php?topic=6474.0) | Open | None |
| Prince of Wales Gold Mine (https://www.ucet.org.uk/index.php?topic=1147.0) | Open, some sealed | None |
| Pwll Glas Mine (https://www.ucet.org.uk/index.php?topic=920.0) | Open | None |
| Red Dragon Mine (https://www.ucet.org.uk/index.php?topic=922.0) | Open | None |
| Rhewl Cave (Prion) (https://www.ucet.org.uk/index.php?topic=924.0) | Open | None |
| Rhiw Bach Mine (https://www.ucet.org.uk/index.php?topic=927.0) | Landowner permission | None |
| Rhiw Crown Manganese Mine (https://www.ucet.org.uk/index.php?topic=8434.0) | Open (shaft) | SRT |
| Rhiwbach New Vein quarry adit (https://www.ucet.org.uk/index.php?topic=1470.0) | Open | Waders |
| Rhosydd Mine (https://www.ucet.org.uk/index.php?topic=930.0) | Open | None |
| Rhuallt Mine #1 (https://www.ucet.org.uk/index.php?topic=933.0) | Open | SRT |
| Rhuallt Mine #2 (https://www.ucet.org.uk/index.php?topic=935.0) | Collapsed | JCB |
| Rhuallt Mine #3 (https://www.ucet.org.uk/index.php?topic=937.0) | Open | Ladders/SRT |
| Rhydymain Adit (https://www.ucet.org.uk/index.php?topic=474.0) | Open | Dingy/wetsuit for lower workings/drainage |
| Siamber Wen (Sink) (https://www.ucet.org.uk/index.php?topic=3650.0) | Unknown - private land | None |
| Smallclough Lead mine (Alston) (https://www.ucet.org.uk/index.php?topic=7850.0) | Open | None |
| Soot Shaft (https://www.ucet.org.uk/index.php?topic=939.0) | Landowner permission | Multiple ladders, SRT |
| Spar Mine (Hendre) (https://www.ucet.org.uk/index.php?topic=941.0) | Landowner permission | None (SRT optional) |
| Sygun Copper Mine (Show Mine) (https://www.ucet.org.uk/index.php?topic=954.0) | Entry Fee | None |
| Sygun Mines (https://www.ucet.org.uk/index.php?topic=956.0) | Open | None |
| Tal y bont Mines (1) (https://www.ucet.org.uk/index.php?topic=10606.0) | Open (SRT optional) | None |
| Tal y bont Mines (2) (https://www.ucet.org.uk/index.php?topic=419.0) | Open | Unknown |
| Tal y bont Mines (3) (https://www.ucet.org.uk/index.php?topic=421.0) | Open | SRT |
| Tal y bont Mines (4) (https://www.ucet.org.uk/index.php?topic=423.0) | Unknown | Unknown |
| Tan y Ogof Caves (https://www.ucet.org.uk/index.php?topic=958.0) | Open | None |
| Trecastell Mine (https://www.ucet.org.uk/index.php?topic=960.0) | Open | None |
| Trevor Hall cave (https://www.ucet.org.uk/index.php?topic=8291.0) | Open | None |
| Tyllau Mwn Mine (https://www.ucet.org.uk/index.php?topic=1302.0) | Open | None |
| Ty'n-y-ffridd Slate Mine (https://www.ucet.org.uk/index.php?topic=8352.0) | Open | None |
| Unnamed Minera Cave (https://www.ucet.org.uk/index.php?topic=11951.0) | Open | None |
| Wedding Cave Mine: (https://www.ucet.org.uk/index.php?topic=962.0) | Open | None |
| West Mine (Alderley Edge) (https://www.ucet.org.uk/index.php?topic=8726.0) | Access via DCC | None (SRT optional) |
| White Quarry Caves (https://www.ucet.org.uk/index.php?topic=964.0) | Open | None |
| Wood Mine (Alderley Edge) (https://www.ucet.org.uk/index.php?topic=3705.0) | Access via DCC | None (SRT/cowstails optional) |
| Wrysgan Mine (https://www.ucet.org.uk/index.php?topic=968.0) | Open | None (SRT/cowstails optional) |
Open: Entrances may be gated but are unlocked or passible. It is assumed that no specific permissions are required for access.
None: Indicates no equipment other than basic caving gear required.