Use a key to unlock this medieval sewer tunnel.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

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

A museum dedicated to secret surveillance.

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

What happens when you cross a mayor and a painter?

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

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

A public work of art that also provides some relief from the summer heat.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

A cemetery for Slovenian notables also serves as a popular recreation space.

Strange rumors surround the artist who created these solemn metal guard dogs.

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

A whimsical bridge adorned with decorative dragons.

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

This abandoned Slovenian military barracks has become a punky-political art squat.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

Unconventional site where the tracks of Zurich tramcars intersect.

Though it may look like a businessman's lost luggage, this case suspended under a highway bridge is actually a contemporary art installation.