A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Sloth rehabilitation center in the jungle of Costa Rica.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Disused penal colony features prisoner artwork, some sketched in human blood.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The youngest volcano in Central America.

Play heads or tails with thousands of different coins.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Home to the world's oldest functioning orrery.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

On the Oregon coast there is a natural hole that seems to be draining the sea.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

This ghost town was once a cult-like religious utopian settlement.

Step into the cool deep past and unknown future of who begat who.

A ghost town that held steady longer than most, but finally gave up the ghost.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

The largest island on the great salt lake is home to curious creatures and strange stories.