This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Monasteries on rock pillars, once accessible only by frayed ropes.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

A whimsical bridge adorned with decorative dragons.

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

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

Eat the ultimate iteration of Portugal's most beloved pastry.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Rusted structures stand like ghosts of Cyprus' 6,000-year-old copper industry.

This no man's land slicing through the island is strewn with abandoned relics of another time.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Architectureal fantasy quarter of Rome.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

A relic of the Cold War tucked away in the forested hills above Bratislava.

The largest fountain in Bratislava.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.