Ecosystems

A meditative space out of a fantasy story.

A scenic canyon with thick forests and historic ruins.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Abandoned tunnels dug for the once-thriving sea salt industry on the coast of southern Spain.

A dark tunnel leads to a striking white crater that seems to be from another planet.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

The cave where two British judges hid in exile after sentencing the king to death.

The historic cave is both a symbol of superstition and black magic and inspired one of the early Christian converts in Botswana.

One thousand trees were planted in Norway to be used to print books a century from now.