1. Lake Retba, Senegal
2. Great Blue Hole, Belize
3. Leshan Giant Buddha, China
4. Derweze, Turkmenistan
5. Ice Cave in Skaftafell, Iceland
6. Chand Baori, Rajasthan
7. Waitomo Glowworm Caves, New Zealand
8. Tunnel of Love, Klevan, Ukraine
9. Ancient Underwater City, China
10. Jacob’s Well, Texas
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