Blue Grotto
Capri, Italy

- Photo Credit: Wikimedia Commons
Callao Cave
Cagayan, Philippines

- Photo Credit: Rawen Balmana / Flickr (CC)
Crystal Cave
Hamilton Parrish, Bermuda

- Photo Credit: Andrew Malone / Flickr (CC)
Reed Flute Cave
Guangxi, China

- Photo Credit: Bernt Rostad / Flickr (CC)
Fingal's Cave
Isle of Staffa, Scotland

- Photo Credit: Wikimedia Commons
Kartchner Caverns
Arizona, United States of America

- Photo Credit: Wikimedia Commons
Eisriesenwelt Ice Cave
Werfen, Austria

- Photo Credit: Wikimedia Commons
Marble Caves
Patagonia, Chile

- Photo Credit: Wikimedia Commons
Phraya Nakhon Cave
Prachuap Khiri Khan Province, Thailand

- Photo Credit: Wikimedia Commons
Predjama Castle
Predjama, Slovenia

- Photo Credit: Leandro Neumann Ciuffo / Flickr (CC)
Chinhoyi Caves
Chinhoyi District, Zimbabwe

- Photo Credit: Wikimedia Commons
The Cave of Three Bridges
Tannourine, Lebanon

- Photo Credit: Wikimedia Commons
Vatnajökull Glacier Cave
Vatnajökull National Park, Iceland

- Photo Credit: David Phan / Flickr (CC)
Waitomo Glowworm Caves
Waitomo, New Zealand

- Photo Credit: 2il org / Flickr