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

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Quite simply the largest tree in the world (by volume).

This maze-like slot canyon is a unique gem within an already fascinating geological area.

Rising from the sea like a stone monster.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Famously misunderstood wonder of the ancient world

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

The sign at the garden gate reads: "These Plants Can Kill."

Eighteen miniature death-scene dioramas.

A taste of the macabre Tokyo's ritzy shopping district.

Medicinal spa created with the discharge from a geothermal energy plant.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Dramatic river bend surrounds a natural red-rocked pedestal.

On Japan's Tashirojima Island, cats are king.

A snapshot of the city's fascinating voodoo culture.