This simple roadside art installation ended up sparking a folk art movement and a controversy of international proportions.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

It was meant to help transport wounded soldiers to a secret underground hospital.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Hindu temple of the dead home to hundreds of long-tailed macaques.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

One native village in Bali lays their dead at the foot of a holy tree whose natural fragrance seems to hide the stench as the bodies decompose.

This sacred cave temple is home to thousands of bats and according to legend, a giant snake king.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This floating sculpture of ice is a poignant reminder of nature's power.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

An ancient Egyptian temple in the middle of Madrid, Spain.

Commonly acknowledged as the only public monument to the Devil himself.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

A museum dedicated to secret surveillance.