World's largest bell sits on the grounds of the Kremlin in Moscow.

Ancient burial grounds of the wealthy.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Romania's triumphal arch looks out over Bucharest.

One of the most remote and isolated villages on the Arabian Peninsula.

Stunning Roman aqueduct used for 1900 years and still standing.

Mediterranean castle on a tiny Turkish island.

3,000 market stands in five former Zeppelin hangars.

What happens when you cross a mayor and a painter?

Cliffside houses provide a spectacular view from their perch above the valley.

Famously misunderstood wonder of the ancient world

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

Go inside to really appreciate this 500-year-old technological masterpiece.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

Water and windows define this defensive Italian well.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

The oldest hall in Iceland was written of in the Sagas and features a centuries-old escape tunnel.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Macabre astrological automaton clock dating to the late 1400s.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

The world's second-largest sundial, made entirely out of stone.