Dancing skeletal figures pay homage to a medieval mural destroyed during World War II.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

One of the few remaining monuments dedicated to South Boston's Irish heritage.

A slice of central Asia in the middle of Berlin.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

Annual street carnival celebrating Indonesian heritage.

Replica of mosque destroyed by Russia in the 16th century.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

A coastal monument honors one of Mexico's most notable immigrant groups.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

Stunning ruins of what was once the center of one of the greatest empires in East Africa.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A moving and macabre World War I-era painting by the great artist Otto Dix.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The Avenue of Mausolea is a series of grand palatial tombs.

Salute the leader of the proletariat.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.