WORLDS LONGEST SEA CAVES - August 2013
LENGTH 
Rank Cave Name Location Region Country METERS FEET
1 Matainaka Cave Otago Otago New Zealand 1540 5052
2 Mercer Bay Cave Waitakere Reg.Park Auckland New Zealand 470 1542
3 Pink Cathedral Cave Otago Otago New Zealand 404 1325
4 Sea Lion Cave   Oregon USA 401 1315
5 Painted Cave Santa Cruz Island California USA 374 1227
6 Waiahuakua Cave Kauai Hawaii USA 352 1155
7 Cueva Tres Pisos Baja California California Mexico 316 1037
8 Holl o Boadie on Papa Stour Shetland Islands Scotland UK 300 984
9 Waiwaipuhi Cave Kauai, Hawaii Hawaii USA 290 951
10 Puffgin Grotto Tongass Alaska USA 287 942
11 Sunbeam-by-the-Sea Cave Punta Banda, Baja Baja Mexico 270 886
12 Great Fangs Cave Otago Otago New Zealand 259 850
13 Catacombs Cave Anacapa Island California USA 246 807
14 Cathedral Cave Anacapa Island California USA 241 791
15 Forbidden Fissures Santa Cruz County California USA 241 791
16 Sandside Head Cave #2 Thurso, Highland Scotland UK 230 755
17 Sea Maze San Luis Obispo County California USA 229 751
18 Waialoha Cave Kauai, Hawaii Hawaii USA 225 738
19 Virgin's Spring Lundy Island, Devon England UK 225 738
20 Sand Hill Bluff Cave Santa Cruz Co. California USA 206 676
21 Jumbo Gumbo Santa Rosa Island California USA 205 673
22 Parallel Tunnels Punta Banda, Baja Baja Mexico 204 669
23 Cathedral Cave The Catlins   New Zealand 199 653
24 Bat Cave Santa Cruz Island California USA 190 623
25 Seal Canyon Cave Santa Cruz Island California USA 189 620
26 Arch Cave San Diego County California USA 187 614
27 Stalactite Cave Arbroath, Tayside Scotland UK 180 591
28 Mackinnon's Cave Isle of Mull, Strathclyde Scotland UK 180 591
29 Seal's Cave Lewis, Western Isles Scotland UK 180 591
30 Keyhole Rock Cave Anacapa Island California USA 180 591
31 Three Door Cave Anacapa Island California USA 180 591
32 Green Grotto Santa Cruz Island California USA 180 591
33 Swiss Surprise Cave Santa Cruz Island California USA 176 577
34 Big Mother Cave Santa Cruz Co. California USA 173 568
35 Shark's Teeth Cave Santa Cruz Island California USA 158 518
36 Bixby Landing Cave Monterey County California USA 158 518
37 Wolf's lair Tongass Alaska USA 155.5 510
38 Whatipu Sea Caves Whatipu West Auckland New Zealand 155.1 509
39 Blue Grotto isle of Kastellorizo Dodecanese Greece 155 509
40 Riko Riko Cave Poor Knight Islandas New Zealand New Zealand 153 502
41 Bass Rock Cave North Berwick, Lothian Scotland UK 150 492
42 Sandside Head Cave #1 near Thurso, Highland Scotland UK 150 492
43 Three Fingers Cave Anacapa Island California USA 149 489
44 Cave of the Mists Santa Cruz Island California USA 149 489
45 Sarawak Chamber Santa Cruz County California USA 148 486
46 Neptune's Trident East Fork Santa Cruz Island California USA 145 476
47 Cave of the Lost Soles Mendocino County California USA 142 466
48 Houle de la Banche Cotes-d'Armor Bretagne France 142 466
49 Point Buchon Cave San Luis Obispo Co. California USA 141 463
50 Half-Gone Cave Anacapa Island California USA 141 463
51 Faille de Brezellec Finistere Bretagne France 140 459
52 Witch's Cauldron Santa Rosa Island California USA 139 456
53 Respiring Chimney Cave Anacapa Island California USA 137 449
54 Cueva Valdez Santa Cruz Island California USA 131 430
55 Geo-na-h-airde St. Kilda, Western Isles Scotland UK 130 427
56 Maniniholo Cave Kauai Hawaii USA 129.5 425
57 Cave of the Bird's Eggs Santa Cruz Island California USA 129 423
58 Frenchy's Cave Anacapa Island California USA 129 423
59 Starfish Cave Anacapa Island California USA 129 423
60 Cave of the Harbor Seals Punta Banda Baja Mexico 128 420
61 Victory Cave Anacapa Island California USA 126 413
62 Long Beach Cave Otago Otago New Zealand 125 410
63 Peter's Creek Cove Cave Mendocino County California USA 125 410
64 Painted Grotto Santa Cruz Island California USA 124 407
65 Double Door Cave San Luis Obispo Co. California USA 123 404
66 Shipwreck Cave Santa Cruz Island California USA 123 404
67 Seastack Cave Santa Cruz Island California USA 122 400
68 Lady's Harbor Cave Santa Cruz Island California USA 122 400
69 Owl Cave Tongass Alaska USA 121 397
70 Papanikolis Meganisi, Leucada   Greece 120 394
71 Culzean Castle Cave #3 near Ayr, Strathclyde Scotland UK 120 394
72 Rovers' Cave Tobermory Ontario Canada 120 394
73 Complex Chasm Anacapa Island California USA 119 390
74 Room with many Windows Punta Banda Baja Mexico 119 390
75 Pt. Resistance Cave Marin County California USA 118 387
76 Natural Bridge Cave Santa Cruz Island California USA 117 384
77 La Grieta Anacapa Island California USA 116 381
78 Grande grotte du Talut Morbihan Bretagne France 116 381
79 Watcomb Bay Cave Isle of Wight England UK 115 377
80 Great X Cave Anacapa Island California USA 113 371
81 Kalalau Landslide Cave Kauai Hawaii USA 112 367
82 Little River Pit Mendocino County California USA 111 365
83 Dry Sandy Beach Cave Santa Cruz Island California USA 111 364
84 Emerald Cave isle of Milos Cyclades Greece 110 361
85 Dickmont's Den Cave Arbroath, Tayside Scotland UK 110 361
86 Fast Castle Head Cave Berwick, Lothian Scotland UK 110 361
87 Kalalau Beach Cave Kauai Hawaii USA 110 361
88 Little Scorpion Bay #2 Santa Cruz Island California USA 108 354
89 Smuggler's Cave San Diego County California USA 108 354
90 Surging T Cave Santa Cruz Island California USA 108 354
91 Collapsing Cave Anacapa Island California USA 108 354
92 Outside Tunnel Cave Anacapa Island California USA 108 354
93 Cormorant's/Mackinnon's Cave Isle of Staffa, Strathclyde Scotland UK 107 351
94 Surfing Tunnel Santa Cruz County California USA 107 351
95 Breathing Cave Santa Cruz Island California USA 106 348
96 Starfish Cave Mendocino County California USA 102 335
97 Midden Point Cave Santa Cruz Island California USA 102 335
98 Cavern Point Cave Santa Cruz Island California USA 101 331
99 Pirate's Den Kauai Hawaii USA 101 331
100 Uamh Freisgill Loch Eriboli, Highland Scotland UK 100 328
101 Flamborough Head Cave #4a Bridlington, Humberside England UK 100 328
102 Livermore Head Sea Cave #5 Torquay, Devon England UK 100 328
103 Piper's Cave Tresco, Isles of Scilly England UK 100 328