| WORLDS LONGEST SEA CAVES - December 2008 | ||||||
| LENGTH | ||||||
| Rank | Cave Name | Location | Region | Country | METERS | FEET |
| 1 | Painted Cave | Santa Cruz Island | California | USA | 374 | 1227 |
| 2 | Waiahuakua Cave | Kauai | Hawaii | USA | 352 | 1155 |
| 3 | Cueva Tres Pisos | Baja California | California | Mexico | 316 | 1037 |
| 4 | Holl o Boadie on Papa Stour | Shetland Island | England | UK | 300 | 984 |
| 5 | Waiwaipuhi Cave | Kauai, Hawaii | Hawaii | USA | 290 | 951 |
| 6 | Sunbeam-by-the-Sea Cave | Punta Banda, Baja | Baja | Mexico | 270 | 886 |
| 7 | Catacombs Cave | Anacapa Island | California | USA | 246 | 807 |
| 8 | Cathedral Cave | Anacapa Island | California | USA | 241 | 791 |
| 9 | Forbidden Fissures | Santa Cruz County | California | USA | 241 | 791 |
| 10 | Sandside Head Cave #2 | Thurso, Highland | Scotland | UK | 230 | 755 |
| 11 | Sea Maze | San Luis Obispo County | California | USA | 229 | 751 |
| 12 | Waialoha Cave | Kauai, Hawaii | Hawaii | USA | 225 | 738 |
| 13 | Virgin's Spring | Lundy Island, Devon | England | UK | 225 | 738 |
| 14 | Sand Hill Bluff Cave | Santa Cruz Co. | California | USA | 206 | 676 |
| 15 | Jumbo Gumbo | Santa Rosa Island | California | USA | 205 | 673 |
| 16 | Parallel Tunnels | Punta Banda, Baja | Baja | Mexico | 204 | 669 |
| 17 | Bat Cave | Santa Cruz Island | California | USA | 190 | 623 |
| 18 | Seal Canyon Cave | Santa Cruz Island | California | USA | 189 | 620 |
| 19 | Arch Cave | San Diego County | California | USA | 187 | 614 |
| 20 | Stalactite Cave | Arbroath, Tayside | Scotland | UK | 180 | 591 |
| 21 | Mackinnon's Cave | Isle of Mull, Strathclyde | Scotland | UK | 180 | 591 |
| 22 | Seal's Cave | Lewis, Western Isles | Scotland | UK | 180 | 591 |
| 23 | Keyhole Rock Cave | Anacapa Island | California | USA | 180 | 591 |
| 24 | Three Door Cave | Anacapa Island | California | USA | 180 | 591 |
| 25 | Green Grotto | Santa Cruz Island | California | USA | 180 | 591 |
| 26 | Swiss Surprise Cave | Santa Cruz Island | California | USA | 176 | 577 |
| 27 | Big Mother Cave | Santa Cruz Co. | California | USA | 173 | 568 |
| 28 | Shark's Teeth Cave | Santa Cruz Island | California | USA | 158 | 518 |
| 29 | Bixby Landing Cave | Monterey County | California | USA | 158 | 518 |
| 30 | Blue Grotto | isle of Kastellorizo | Dodecanese | Greece | 155 | 509 |
| 31 | Riko Riko Cave | Poor Knight Islandas | New Zealand | New Zealand | 153 | 502 |
| 32 | Bass Rock Cave | North Berwick, Lothian | Scotland | UK | 150 | 492 |
| 33 | Sandside Head Cave #1 | near Thurso, Highland | Scotland | UK | 150 | 492 |
| 34 | Three Fingers Cave | Anacapa Island | California | USA | 149 | 489 |
| 35 | Cave of the Mists | Santa Cruz Island | California | USA | 149 | 489 |
| 36 | Sarawak Chamber | Santa Cruz County | California | USA | 148 | 486 |
| 37 | Neptune's Trident East Fork | Santa Cruz Island | California | USA | 145 | 476 |
| 38 | Cave of the Lost Soles | Mendocino County | California | USA | 142 | 466 |
| 39 | Houle de la Banche | Cotes-d'Armor | Bretagne | France | 142 | 466 |
| 40 | Point Buchon Cave | San Luis Obispo Co. | California | USA | 141 | 463 |
| 41 | Half-Gone Cave | Anacapa Island | California | USA | 141 | 463 |
| 42 | Faille de Brezellec | Finistere | Bretagne | France | 140 | 459 |
| 43 | Witch's Cauldron | Santa Rosa Island | California | USA | 139 | 456 |
| 44 | Respiring Chimney Cave | Anacapa Island | California | USA | 137 | 449 |
| 45 | Cueva Valdez | Santa Cruz Island | California | USA | 131 | 430 |
| 46 | Geo-na-h-airde | St. Kilda, Western Isles | Scotland | UK | 130 | 427 |
| 47 | Maniniholo Cave | Kauai | Hawaii | USA | 129.5 | 425 |
| 48 | Cave of the Bird's Eggs | Santa Cruz Island | California | USA | 129 | 423 |
| 49 | Frenchy's Cave | Anacapa Island | California | USA | 129 | 423 |
| 50 | Starfish Cave | Anacapa Island | California | USA | 129 | 423 |
| 51 | Cave of the Harbor Seals | Punta Banda | Baja | Mexico | 128 | 420 |
| 52 | Victory Cave | Anacapa Island | California | USA | 126 | 413 |
| 53 | Peter's Creek Cove Cave | Mendocino County | California | USA | 125 | 410 |
| 54 | Painted Grotto | Santa Cruz Island | California | USA | 124 | 407 |
| 55 | Double Door Cave | San Luis Obispo Co. | California | USA | 123 | 404 |
| 56 | Shipwreck Cave | Santa Cruz Island | California | USA | 123 | 404 |
| 57 | Seastack Cave | Santa Cruz Island | California | USA | 122 | 400 |
| 58 | Lady's Harbor Cave | Santa Cruz Island | California | USA | 122 | 400 |
| 59 | Papanikolis | Meganisi, Leucada | Greece | 120 | 394 | |
| 60 | Culzean Castle Cave #3 | near Ayr, Strathclyde | Scotland | UK | 120 | 394 |
| 61 | Rovers' Cave | Tobermory | Ontario | Canada | 120 | 394 |
| 62 | Complex Chasm | Anacapa Island | California | USA | 119 | 390 |
| 63 | Room with many Windows | Punta Banda | Baja | Mexico | 119 | 390 |
| 64 | Pt. Resistance Cave | Marin County | California | USA | 118 | 387 |
| 65 | Natural Bridge Cave | Santa Cruz Island | California | USA | 117 | 384 |
| 66 | La Grieta | Anacapa Island | California | USA | 116 | 381 |
| 67 | Grande grotte du Talut | Morbihan | Bretagne | France | 116 | 381 |
| 68 | Watcomb Bay Cave | Isle of Wight | England | UK | 115 | 377 |
| 69 | Great X Cave | Anacapa Island | California | USA | 113 | 371 |
| 70 | Kalalau Landslide Cave | Kauai | Hawaii | USA | 112 | 367 |
| 71 | Little River Pit | Mendocino County | California | USA | 111 | 365 |
| 72 | Dry Sandy Beach Cave | Santa Cruz Island | California | USA | 111 | 364 |
| 73 | Emerald Cave | isle of Milos | Cyclades | Greece | 110 | 361 |
| 74 | Dickmont's Den Cave | Arbroath, Tayside | Scotland | UK | 110 | 361 |
| 75 | Fast Castle Head Cave | Berwick, Lothian | Scotland | UK | 110 | 361 |
| 76 | Kalalau Beach Cave | Kauai | Hawaii | USA | 110 | 361 |
| 77 | Little Scorpion Bay #2 | Santa Cruz Island | California | USA | 108 | 354 |
| 78 | Smuggler's Cave | San Diego County | California | USA | 108 | 354 |
| 79 | Surging T Cave | Santa Cruz Island | California | USA | 108 | 354 |
| 80 | Collapsing Cave | Anacapa Island | California | USA | 108 | 354 |
| 81 | Outside Tunnel Cave | Anacapa Island | California | USA | 108 | 354 |
| 82 | Cormorant's/Mackinnon's Cave | Isle of Staffa, Strathclyde | Scotland | UK | 107 | 351 |
| 83 | Surfing Tunnel | Santa Cruz County | California | USA | 107 | 351 |
| 84 | Breathing Cave | Santa Cruz Island | California | USA | 106 | 348 |
| 85 | Starfish Cave | Mendocino County | California | USA | 102 | 335 |
| 86 | Midden Point Cave | Santa Cruz Island | California | USA | 102 | 335 |
| 87 | Cavern Point Cave | Santa Cruz Island | California | USA | 101 | 331 |
| 88 | Pirate's Den | Kauai | Hawaii | USA | 101 | 331 |
| 89 | Uamh Freisgill | Loch Eriboli, Highland | Scotland | UK | 100 | 328 |
| 90 | Flamborough Head Cave #4a | Bridlington, Humberside | England | UK | 100 | 328 |
| 91 | Livermore Head Sea Cave #5 | Torquay, Devon | England | UK | 100 | 328 |
| 92 | Piper's Cave | Tresco, Isles of Scilly | England | UK | 100 | 328 |