A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

A little known Colombian theme park of giant curiosities.

Former drug lord’s manor, now a theme park. Watch out for the hippos.

An ancient city hidden in the heart of the Sierra Nevada mountains.

Cathedral carved out of salt, located a mile below the earth's surface.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

Enchanting cave with a river crashing through the roof.

A dangling church built over a Colombian gorge.

This picturesque mansion has gone from opulent ruin to nature museum.

A thick blanket of beautiful pampas grass cloaks this unique Japanese landscape.

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

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Lavish royal estate punctuated with heated greenhouses.

This "floating railway" is one of the world's oldest monorail systems.

The most alien-looking place on Earth.

Intensely colorful calcite pools in Southern China.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.