swap_horiz Millennium Cave Alternatives

1

Manjanggul

Manjanggul is a lava tube on Jeju Island, South Korea, extending approximately 8.9 kilometers. It formed from basaltic l...

South Korea Unesco Jeju Show Cave

9.5 Brilliant

2

Jeju Volcanic Island Tubes (UNESCO site)

Jeju Volcanic Island and Lava Tubes is a UNESCO World Heritage property on Jeju Island, South Korea, inscribed in 2007....

Korea Protected World Heritage Multiple

9.5 Brilliant

3

Kipuka Kanohina Cave System

The Kipuka Kanohina Cave System is an extensive network of lava tubes located on the southwestern rift zone of Mauna Loa...

Hawaii Mauna Loa Conservation Cave System

9.4 Excellent

4

Kazumura Cave

Kazumura Cave is a privately accessible lava tube within Hawaii’s Kilauea volcano. It represents a significant geologica...

Hawaii Kilauea Private Longest

9.2 Excellent

5

Leviathan Cave

Leviathan Cave is a substantial lava tube within Kenya’s Chyulu Hills. It represents one of Africa's longest known lava...

Africa Kenya Long Chyulu Hills

9.2 Excellent

6

Cueva del Viento

Cueva del Viento is a substantial lava tube located on the island of Tenerife, Spain. Formed during volcanic activity ap...

Spain Multi Level Long Tenerife

9.2 Excellent

7

Undara Lava Tubes

Undara Lava Tubes are extensive subterranean passages within a basalt landscape in Queensland, Australia. Formed by slow...

Australia Queensland Basalt Show Cave

9.2 Excellent

8

Manjanggul Cave

Manjanggul Cave is a remarkably extensive lava tube located on Jeju Island, South Korea. Formed by flowing basaltic lava...

Asia Volcanic South Korea World Heritage

9.2 Excellent

9

Algar do Carvão

Algar do Carvão is a significant lava tube located in Portugal’s Azores islands. It's notable for being one of Europe’s...

Portugal Azores Show Cave Terceira

9.1 Excellent

10

Túnel de la Atlántida

The Túnel de la Atlántida is a submerged lava tube located off the coast of Lanzarote, Spain. It represents one of the l...

Spain Submarine Lanzarote LA Corona

9.1 Excellent

11

Thurston Lava Tube (Nāhuku)

Thurston Lava Tube, known in Hawaiian as Nāhuku, is a lava cave in Hawaiʻi Volcanoes National Park on the island of Hawa...

Big Island Hawaii National Park Short

9.1 Excellent

12

Víðgelmir

Víðgelmir is a vast Icelandic lava tube located within the Hallmundarhraun lava field. It’s notable for being one of Eur...

Large Iceland Show Cave Hallmundarhraun

9.0 Excellent

13

Thurston Lava Tube (Nahuku)

The Thurston Lava Tube, formerly known as Nahuku, offers a unique glimpse into volcanic activity. Located within Hawai'i...

Accessible Hawaii National Park Volcanic

8.7 Great

14

Leiðarendi Cave

Leiðarendi Cave is a lava tube in a lava field near Bláfjöll, the Blue Mountains, in southwest Iceland. Its passages con...

Accessible Guided Medium Iceland

8.3 Great

15

Hana Lava Tube (Ka'elekū Caverns)

Hana Lava Tube, also called Ka'eleku Caverns, is a lava tube near Hana on the island of Maui, Hawaii. It formed when bas...

Accessible Hawaii Tourist Guided

8.2 Great

16

Waipu Cave

Waipu Cave is a limestone cave system in the Waipu area of Northland, on New Zealand's North Island. Its passages contai...

Accessible New Zealand Tourist Northland

7.2 Good

17

Waianapanapa Caves

Waianapanapa Caves are lava-tube formations in Waiʻānapanapa State Park on Maui, Hawaiʻi. They were created when molten...

Accessible Coastal Hawaii Maui

7.1 Good

18

Anahulu Cave (Tonga)

Anahulu Cave is a limestone cave in the village of Haveluliku on Tongatapu, Tonga. It is known for freshwater pools insi...

Accessible Tourist Pacific Freshwater

6.9 Fair

19

Bear Trap Cave

Bear Trap Cave is a lava tube in Idaho's Craters of the Moon National Monument and Preserve. It lies within the Great Ri...

Idaho Remote Long Great Rift

6.5 Fair

20

Wapi Cave

Wapi Cave is a geologically significant lava tube located within the Wapi lava field in Idaho, USA, formed during a preh...

Idaho Remote Volcanic North America

6.5 Fair