These azure waters were thought to lead to the Mayan Underworld.

A 30-acre garden inspired by the principles of modern physics.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The most alien-looking place on Earth.

Centuries-old bridges grown from tangled roots.

Fine dining in the bizarre world of Lewis Carroll.

A gargantuan crystal kingdom.

A hotel and restaurant serving as the mecca of kitsch.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

An Aztec snake god has taken the material form of an apartment complex.

The world's only museum devoted to the wonders of fluorescence.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

The first declared National Monument in the United States.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Staves, storm-calling, and of course, necropants.

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

An Australian lake whose pink hue defies scientific explanation.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A battle between nature and architecture in the Cambodian jungle.

Enormous lake at the bottom of a unique cave system.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Towering basalt columns, a creation of fire and ice.