Rock cut panel showing the Hindu God Lord Shiva in Cave no 29, the Dhuma Lena Cave, at Ellora, Maharashtra State, India

Rock cut panel depicting the Hindu God Lord Shiva and his wife Parvati, in Cave No 29, the Dhumar Lena Cave, at Ellora, Maharashtra State, India

Painting in Cave 17, one of the world-heritage Buddhist caves at Ajanta, carved from a gorge in the Waghore River, Maharashtra State, India

Reflections from Cathedral Cavern, Little Langdale Valley, Lake District, Cumbria, England, United Kingdom, Europe

Detail of mural inside Cave No.17, Ajanta, UNESCO World Heritage Site, Maharashtra, India, Asia

Detail of mural on ceiling inside Cave No.17, Ajanta, UNESCO World Heritage Site, Maharashtra, India, Asia

Ceiling at Cave 17, one of the best decorated at the Buddhist caves site at Ajanta, UNESCO World Heritage Site, Maharashtra, India, Asia

Fantasy Cave, Hamilton Parish, Bermuda, Central America

Cephalonia, tourists driving in boats in front of Melissani cave in Sami, Ionian Islands, Greece