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

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Once the most densely populated place in the world, this island is now a ghost town.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Siberian ghost town built by gulag prisoners.

The remains of diamond fever taken over by the desert.

Japanese island famous for poison gas and fluffy bunnies.

Experience park where visitors are told to expect the unexpected.

Rusting ships sit in a desert where a sea used to be.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Bioluminescent firefly squid light up this Japanese fishing port.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Nightmarish example of the unintended consequences of weapons testing.

One of Japan's most famous sights, the bridge was originally built in 1673.

An exquisite tunnel of cascading flowers.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

North Korea's massive "hotel of doom."

Mysterious rocks that ring musically when struck.

An alley covered with 20 years of bubble gum.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Ancient cave tombs known as the "houses of fairies."

Huge masonic hall in Philadelphia with lavishly themed rooms.