All regions

Longest caves

Show deepest caves.

RankCave NameLength (km)Vertical Range (m)RegionTypeMore Info
1Three Counties System87253Northern DalesAll caveShort description
2Ogof Draenen70151South WalesAll caveShort description
3Ogof Ffynnon Ddu50308South WalesAll caveShort description
4Agen Allwedd32.5160South WalesAll caveShort description
5Ogof Daren Cilau System28232South WalesAll caveShort description
6Kingsdale Master Cave27165Northern DalesAll caveShort description
7Clearwell Caves24107Forest Of DeanPart mineShort description
8Peak Cavern - Speedwell Cavern17.59248Peak DistrictPart mineShort description
9Gaping Gill System16.9197.5Northern DalesAll caveShort description
10Dan-Yr-Ogof16150South WalesAll caveShort description
11Poulnagollum - Poulelva16140Co. ClareAll caveShort description
12Slaughter Stream Cave14100Forest Of DeanAll caveShort description
13Marble Arch - Upper Cradle - Lower Cradle - Prod's Pot - Cascades Rising11.5< 60Co. FermanaghAll cave
14Mossdale Caverns10.560Northern DalesAll caveShort description
15Doolin Cave10.5< 60Co. ClareAll caveShort description
16Lancliffe Pot9.6116Northern DalesAll cave
17Swildon's Hole9.41167MendipAll caveShort description
18Carno8.963South WalesAll caveShort description
19Little Neath River Cave8.8125South WalesAll caveShort description
20Ogof Craig A Ffynnon8115South WalesAll caveShort description
21Cullaun Five7.2< 60Co. ClareAll cave
22The Goyden System7.1< 60Northern DalesAll caveShort description
23Gingling Hole6.9177Northern DalesAll caveShort description
24Reyfad - Pollnacrom - Polltullybrack6.7193Co. FermanaghAll caveShort description
25St. Cuthbert's Swallet6.7145MendipAll caveShort description
26White Scar Cave6.5< 60Northern DalesAll cave
27Mongo Gill Hole - Stump Cross Caverns5.8< 60Northern DalesAll caveShort description
28Coolagh River Cave5.28572Co. ClareAll cave
29Penyghent Pot5.2196Northern DalesAll caveShort description
30Poulnagree5.2130Co. ClareAll cave
31Shannon Cave - Polltullyard5130Co. FermanaghAll caveShort description
32Dale Barn Cave4.9< 60Northern DalesAll cave
33Charterhouse Cave4.868228MendipAll cave
34Giants Hole - Oxlow Caverns4.8211Peak DistrictPart mineShort description
35Meregill - Roaring Hole4.6181Northern DalesAll caveShort description
36Magnetometer Pot4.691Northern DalesAll cave
37Knock Fell Caverns4.5< 60Northern DalesAll cave
38Red Moss/Birkwith System4.2< 60Northern DalesAll cave
39Ogof Llyn Parc4110North WalesPart mine
40Miss Graces Lane Swallet472Forest Of DeanAll caveShort description
41Dub Cote Cave4< 60Northern DalesAll cave
42The Dark Shamrock Traverse - Pollaloughabo - Pollbehan - Moran's Cave4< 60Co. GalwayAll caveShort description
43Crag Cave3.81< 60Co. KerryAll caveShort description
44Noon's Hole - Arch Cave3.7108Co. FermanaghAll cave
45Dow Cave - Providence Pot3.7< 60Northern DalesAll caveShort description
46Wookey Hole3.66182MendipAll caveShort description
47Baker's Pit - Reeds3.631< 60DevonAll caveShort description
48Upper Flood Swallet3.615128MendipAll caveShort description
49Birks Fell Cave3.6142Northern DalesAll cave
50Fergus River Cave3.6< 60Co. ClareAll cave
51Cullaun Three3.578Co. ClareAll caveShort description
52Otter Hole3.352< 60South WalesAll caveShort description
53Cullaun Two3.335< 60Co. ClareAll cave
54Carlswark Cavern3.24361Peak DistrictPart mineShort description
55Fairy Holes3.2< 60Northern DalesAll cave
56Poll-Cahercloggaun West-One3.17< 60Co. ClareAll cave
57Pollaraftra3.1373Co. FermanaghAll cave
58Boreham Cave3.1< 60Northern DalesAll caveShort description
59Cullaun One3.1< 60Co. ClareAll cave
60Bagshawe Cavern3< 60Peak DistrictAll caveShort description
61Uamh An Claonaite2.868110AssyntAll caveShort description
62Ibbeth Peril - Upper Hackergill Caves2.803< 60Northern DalesAll caveShort description
63Eastwater Cavern2.8160MendipAll caveShort description
64Knotlow Cavern2.676Peak DistrictPart mineShort description
65Lathkill Head Cave - Ricklow Cave2.58< 60Peak DistrictAll caveShort description
66Mitchelstown New Cave2.54< 60Co. TipperaryAll caveShort description
67Porth yr Ogof2.53< 60South WalesAll caveShort description
68Boho Caves2.5< 60Co. FermanaghAll caveShort description
69Cloyne Cave2.5< 60Co. CorkAll caveShort description
70Ogof T12.5< 60South WalesAll caveShort description
71Alum Pot System2.454129Northern DalesAll caveShort description
72Aygill Caverns2.438< 60Northern DalesAll caveShort description
73Sleets Gill Cave2.476Northern DalesAll caveShort description
74Polltoophill - Polldeelin2.462Co. GalwayAll cave
75Hurtle Pot - Jingle Pot System2.3764Northern DalesAll cave
76Gragan West Cave2.255< 60Co. ClareAll cave
77Robinsons' Pot2.2< 60Northern DalesAll cave
78Stoke Lane Slocker2.18< 60MendipAll caveShort description
79Tunnel Cave2.135145South WalesAll caveShort description
80Gough's Cave2.13590MendipAll caveShort description
81Polldubh2.13< 60Co. ClareAll cave
82Black Keld2.115< 60Northern DalesAll cave
83Pollballiny2.06580Co. ClareAll cave
84Moran's Cave2.055< 60Co. GalwayAll cave
85Ogof Hesp Alyn297North WalesAll caveShort description
86Cliff Force Cave2< 60Northern DalesAll cave
87Poulawillin2< 60Co. ClareAll cave
88GB Cave1.95134MendipAll caveShort description
89Dog Hole - Crystal Cave1.95< 60Northern DalesAll cave
90Poultalloon1.91< 60Co. ClareAll cave
91Aille River Cave1.9< 60Co. MayoAll caveShort description
92Smeltmill Beck Cave1.9< 60Northern DalesAll cave
93P8 (Jackpot)1.870Peak DistrictAll caveShort description
94Blea Gill Cave1.8< 60Northern DalesAll cave
95Poll Cahermacnaghten1.8< 60Co. ClareAll cave
96Devis Hole Mine Caves - South and East Cave Series1.791< 60Northern DalesPart mineShort description
97Joint Hole1.77< 60Northern DalesAll cave
98Ogof Llyn Ddu1.77< 60North WalesAll cave
99Ogof Afon Hepste1.76< 60South WalesAll caveShort description
100Doonyvardan Cave1.74< 60Co. ClareAll cave
101Polskeheenarinky1.74< 60Co. TipperaryAll cave
102Llanelly Quarry Pot1.70580South WalesAll caveShort description
103Ayleburn Mine Cave1.7< 60Northern DalesAll cave
104Devis Hole Mine Caves - Central Maze1.7< 60Northern DalesAll cave
105Faunarooska Cave1.6994Co. ClareAll cave
106Great Douk Cave1.676< 60Northern DalesAll cave
107Longwood Swallet1.65175MendipAll caveShort description
108Redhouse Lane Swallet1.615< 60Forest Of DeanAll caveShort description
109Redmire Pot1.6117Northern DalesAll cave
110Llygad Llwchwr1.6< 60South WalesAll caveShort description
111Mermaid's Hole (Green Holes of Doolin)1.6< 60Co. ClareAll caveShort description
112Spittle Croft Cave1.6< 60Northern DalesAll caveShort description
113Excalibur Pot1.573< 60North YorkAll caveShort description
114Goatchurch Cavern1.53263MendipAll caveShort description
115Tooth Cave1.525< 60South WalesAll caveShort description
116Long Kin East - Rift Pot1.5113Northern DalesAll cave
117Small Polldeelin (Poulnacapple)1.571Co. GalwayAll cave
118Tullyhona Rising Cave1.565Co. FermanaghAll cave
119Aillwee Cave1.5< 60Co. ClareAll caveShort description
120Allt Nan Uamh Stream Cave1.5< 60AssyntAll caveShort description
121Ogof Cynnes1.5< 60South WalesAll caveShort description
122Ogof Tarddiad Rhymney1.5< 60South WalesAll caveShort description
123Pollnagossan (Pollnadossan)1.5< 60Co. CavanAll cave
124Scoska Cave1.5< 60Northern DalesAll cave
125Borrins Moor Cave1.433108Northern DalesAll cave
126Thrupe Lane Swallet1.417120MendipAll caveShort description
127Cnoc Nan Uamh1.484AssyntAll caveShort description
128Shatter Cave1.373< 60MendipAll caveShort description
129Eglwys Faen1.34< 60South WalesAll caveShort description
130Blue John Caverns1.32490Peak DistrictPart mine
131Ballyglunin Cave1.3< 60Co. GalwayAll caveShort description
132Tyning's Barrow Swallet1.28132MendipAll cave
133Eglin's Hole1.28< 60Northern DalesAll cave
134Marble Steps Pot1.273131Northern DalesAll cave
135Tatham Wife Hole1.219155Northern DalesAll cave
136Big Sink Cave (or swallet)1.2126Forest Of DeanAll caveShort description
137Pant Mawr Pot1.297South WalesAll caveShort description
138Bown Scar Cave1.2< 60Northern DalesAll cave
139Cherry Tree Hole1.2< 60Northern DalesAll cave
140Hagg Gill Pot1.2< 60Northern DalesAll caveShort description
141Windegg Mine Caverns1.2< 60Northern DalesAll cave
142Manor Farm Swallet1.17162MendipAll caveShort description
143Fairy Cave - Hillier's Cave - Hillwithy Cave1.17< 60MendipAll caveShort description
144Crescent Pot1.146122Northern DalesAll cave
145Wigmore Swallet1.125110MendipAll cave
146Ogof Rhyd Sych1.11< 60South WalesAll caveShort description
147Langstroth Pot1.190Northern DalesAll cave
148Ogof Fawr1.176South WalesAll caveShort description
149Grabbers Cave1.1< 60Northern DalesAll cave
150Hugh's Moss Cave1.1< 60Northern DalesAll cave
151Pridhamsleigh Cavern1.1< 60DevonAll cave
152Yew Cogar Cave1.1< 60Northern DalesAll cave
153Little Hull Pot1.097110Northern DalesAll cave
154Heron Pot1.097< 60Northern DalesAll caveShort description
155Ogof Pwll Swnd1.07576South WalesAll cave
156Dry Gill Cave1.07< 60Northern DalesAll cave
157Ogof Fechan1.067< 60South WalesAll caveShort description
158Lower Cales Dale Cave1.055< 60Peak DistrictAll cave
159Malham Cove Risings1.055< 60Northern DalesAll caveShort description
160Pikedaw Calamine Caverns1.055< 60Northern DalesPart mineShort description
161Hammer Pot1.03690Northern DalesAll cave
162Creevy Cave1.024< 60Co. MonaghanAll caveShort description
163Ogof Ap Robert1.01590South WalesAll caveShort description
164Pollnaindre182Co. GalwayAll cave
165Ballynallia Cave1< 60Co. KerryAll cave
166Barras End Mine Caverns1< 60Northern DalesAll cave
167Bullock Pot1< 60Co. ClareAll caveShort description
168Carrickbeg Rising Cave (Bunty Pot)1< 60Co. FermanaghAll cave
169Kent's Cavern1< 60DevonAll caveShort description
170Nidd Head North West Rising1< 60Northern DalesAll cave
171Ogof-Yr-Ardd1< 60South WalesAll caveShort description
172Poll-Cahermaan1< 60Co. ClareAll cave
173Skirwith Cave1< 60Northern DalesAll cave
174Tub Hole1< 60Northern DalesAll cave

Total cave length (for caves of 1 km and above): 835.905 km.

If you don't see the cave you want, but you know it should be in the all regions section, remember that this list only shows caves with at least 1 km length of natural passage. Other caves may show up in the list of deepest caves in all regions.

However, if you are looking for a specific cave that does have at least 1 km length of natural passage, and should be listed here, please let me know about it so I can update the database.