Before this rocky hill was home to a chapel, it was used as a lookout by Romans and Moors.

The crumbling ruins of an abandoned 12th-century monastery.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

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

This fairytale medieval church in Poland originally spent centuries in Norway.

A striking, modern church devoted to a nun who loved God and beer.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

One of the deepest indoor swimming pools in the world.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

A jazz band formed by African water animals in the heart of Flemish Brabant.