Caves

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

A historic Christian shrine nestled within a spectacular natural cave.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

This beautiful waterfall is not easy to reach, but offers a stunning view of the pristine green valley.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

Its dark depths conceal millions of rare, delicate crystal formations.

Nineteen ancient rock-cut Buddhist caves can be found on the outskirts of Mumbai.

This fascinating cave is packed with prehistoric rock art and Stone Age tools.

A series of caves within the gorge hold artifacts from the Stone Age.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

This fantastic cave remained unexplored until 1948 when three schoolboys discovered a hidden entrance.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.