This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

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

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

Macabre astrological automaton clock dating to the late 1400s.

This bridge was constructed from the rubble of the infamous Bastille.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Meet the bronze beloved pet to a family of famous peeing statues.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

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

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Yugoslavia's biggest underground airport lies in ruins.

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

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

The "dragon babies" of southeastern Europe.

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

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

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 impressive collection of skulls and bones was gathered by an ex-zookeeper who took advantage of a pig plague.

Hiding the longest subterranean river known in the world.