This poignant sculpture of a gnarled weapon is a symbol of non-violence.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The prototype for all Nazi concentration camps.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

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

A sprawling nature preserve harbors the world's only living dragons.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This attraction was abandoned after the Chornobyl disaster.

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

This derelict superstructure was a very important warning system for the Soviet military.

The only quarter of the Old City not dedicated to a major world religion.

This small monument marks the divide between the Atlantic and Indian Oceans at the southernmost tip of Africa.

This clock is an architectural flourish that stands out as a landmark among a unique Israeli German community.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

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

A "miracle" that seems to produce more holy fistfights than holy revelations.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

The oldest housing complex in Riga is a mini timeline of architectural trends.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.