 |
| Vietnam's Son Doong Cave, the largest cave in the world, could hold an entire city block of Manhattan—including 40-story skyscrapers. It has its own lush vegetation where sunlight filters in from sinkholes above, and clouds even form near the ceiling when moisture condenses there. |
| Bromo Volcano: East Java, Indonesia |
| Lake Natron: Monduli, Tanzania |
Glowworm Caves: Waitomo, New Zealand |
| Namib Naukluft Park: Namibia |
| Wulingyuan Scenic Area: Zhangjiajie, China |
Jökulsárlón: Vatnajökull National Park, Iceland |
| Socotra, Yemen |
| Grand Prismatic Spring: Yellowstone National Park, Wyoming |
Dos Ojos: Tulum, Mexico |
| Dallol, Ethiopia |
Mauna Kea, Hawaii |
| Valle de la Luna (Moon Valley): Chile |
| Lencois Maranhenses National Park: Brazil |
| White Desert: Farafra, Egypt |