A haunting collection of the vanished and disappearing natural world.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

The Andean town where every single building is decorated with a brightly colored frieze.

An explosion of natural color known as "the river that ran away from paradise."

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

This whimsical home made entirely from clay is basically a giant piece of pottery.

Colombia's biggest botanical garden contains plants from all across the country.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

Known as the site of 'El Dorado,' this mysterious lake is rumored to hold gold beneath its waters.

This colonial town in Colombia sits around the largest stone paved square in South America.

This tiny shop has been serving traditional tamales for more than 200 years.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

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

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

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

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

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

These mysterious circular formations are actually remnants of 19th century gristmills.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

A tiled, multi-level garden of survival in Lyon.