The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

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?

A museum dedicated to secret surveillance.

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.

Look closely, and you'll see this rusty man is crying.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

A memorial to a Swedish hockey player's "encounter" with aliens.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This unique building in the main square stands out among the city's typically Baroque architecture.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Legend says this rock spire is the finger of a witch who wanted to throw the Faroe Islands towards Iceland.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

These airport hangars are now a bustling shopping center with only hints of its past still lingering.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's oldest animated sign is still lighting up the skyline today.

This former Nazi labor camp is now a poignant memorial, complete with giant Soviet-style monuments.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.