Ecosystems

This "floating island" plateau sits 7,671 feet above the forest floor.

A salty cave excavated by elephants and the location of a deadly disease vector.

A tunnel of hardened lava along Maui’s famous Road to Hana.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

A remote forest of stone pillars along the Lena river.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

Rummage through this sunken ship, but leave your scuba gear at home.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

Towering basalt columns, a creation of fire and ice.

Swiss vineyards in a UNESCO heritage site.

Limestone grottoes turns everyday objects into stone.

Once the home of a hermetic monk, this cave now houses a small church.

America's smallest "national forest" has only 33 trees.

The world's most famous cheese caves.