Shop selling 500 flavors of soda has something for everyone.

Enormous lake at the bottom of a unique cave system.

The atmospheric road was never meant to be so creepy.

Eighteen miniature death-scene dioramas.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

The seamy, underground secrets of Portland's criminal past.

A hand-built folk art installation covered with messages of God's love.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A walk through the historic city center, under the streets of Seattle.

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

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

The ghostly remains of an accidental sea.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

A one-of-a-kind collection of a unique medium.

A 16th-century horror show built in a lovely Italian garden.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

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

A 140-year-old castle with underground caves hidden in San Francisco.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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