Biggest Caves in the World

No. of Caves: 34 (12 Buddhist, 17 Hindu, 5 Jain)

Ellora CavesIndia

No. of Caves: 30

Ajanta CavesIndia

Era: c. 17,000 years ago (Upper Paleolithic)

Lascaux CavesFrance

Notable For: Upper Paleolithic rock art (~36,000 years old)

Altamira CaveSpain

Features: Entire underground cities carved into volcanic rock

Cappadocia Cave DwellingsTurkey

Notable Structures: Al-Khazneh (The Treasury), tombs, temples

Petra (Rock-Cut City)Jordan

No. of Caves: Over 700

Mogao Caves