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

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

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

A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

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

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

A Victorian-style home known as the “Castle on the Hill.”

When new viceroys were elected, they passed through this arch to cement the title.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

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

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

Found in the waddenzee, this propeller has been put on public display as a reminder of the Second World War.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

A Spanish town built into the cliffs.

The tallest mountain in mainland Netherlands isn't actually very tall.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.