This hidden garden boasts amazing views of Lyon.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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.

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

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

This magnificent Cincinnati graveyard is also a popular public park.

This 135-year-old weather station studied the effects of the climate on human health.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

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