Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This stone figurine was made more than 6,000 years ago and depicts a female deity of the Neolithic Vinča culture.

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A monastery considered a state-protected cultural monument of exceptional importance, founded in the 14th century by Serbian King Stefan Dečanski.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

What happens when you cross a mayor and a painter?

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

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Try not to get slimed in Tribeca.

Wine bottle sculpture with a ship's stateroom inside.

A bit of retro transportation flair preserved in the world's largest department store.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

A symbol for the opposition to nuclear power around the world.

Denmark's famous pseudo-hill.

Remnants of the Nazis' occupation of Denmark linger along the sand.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.