Caves and underground places: short videos

This page explores various caves and underground places around the world through a series of short videos, each linking to its source. You will learn about the Derinkuyu Underground City, an ancient multi-level underground settlement, and the Khewra Salt Mine located in Punjab, Pakistan. Discover the largest natural cave, Hang Sơn Đoòng, and see the famous Lascaux Cave Paintings in southwestern France. The page also covers the Waitomo Glowworm Cave, a unique tourist attraction in New Zealand, and explains how sinkholes form through the collapse of surface layers. Other topics include the Škocjan Caves in Slovenia, the aquatic cave salamander known as the Olm, and historical sites like the Wieliczka Salt Mine in Poland and the Vardzia Cave Monastery in Georgia.