A vast Communist-era exhibition space in the Bulgarian capital.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

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

"Holy Wisdom" overlooks the city that became its namesake.

"Unity, Creativity, Beauty."

A collection of art from Bulgaria's time as a communist state.

Sofia's legislative center is continuously reinventing itself.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

This impressive mansion in Vinegar Hill has some mysterious details in its architecture.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.