Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

Single runway interrupted by a busy road that cuts across its middle.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

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

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

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

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

The grounds and buildings of an old wood pulp mill have been transformed into an innovative art park and museum.

A Viking man's tribute to his brother stands in Gävle's oldest church.

A brutalist gem towering over the heart of Milan.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The traveling wares of Denmark's most famous author.