A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

The internet as provided by a James Bond villain.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

A two-way chairlift system between Zugliget and the highest point in the city.

The world's largest model of our planetary system.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

The best place in the world to buy tinned fish.

Heralded as one of the prettiest castles in all of Czechia.

This small town's local tradition is to create the world's tallest ice pillar.

A 12th-century church with a medieval fresco and an intriguing “Greek runestone.”

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A golden egg-shaped sauna in the Arctic tundra.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

Crooked windswept pines give this old forest an enchanted and magical look.