A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A whimsical bridge adorned with decorative dragons.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

The scorched Lisbon church that survived two earthquakes and a massive fire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Museum preserving torture methods from the past.

The history and future of cannabis.

What happens when you cross a mayor and a painter?

A museum dedicated to secret surveillance.

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

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

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

The Guinness Record holder as the "tallest cinema in the world" is a building with screens in almost every one of its 12 floors

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

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

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

With over 10,000 lights, this engineering marvel lights up the city after dark.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.