The history of radiation is on safe display at the foot of a radiation science laboratory.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

There has been an astronomical clock on this spot since the 14th century.

The glacier tucked within a New Zealand rainforest.

This museum/fur store is devoted to educating guests on how awful opossums can be.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

A perfect turquoise lake colored with glacier dust.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

The curios of pharmacist and collector Henry Wellcome.

A hands-off space for graffiti artists to hone and display their skills.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

France's most famous cemetery, with some of its most curious tombs.

The oldest stone house in Paris was built by its most famous alchemist.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

The biggest museum dedicated to insects in North America, one of the largest in the world.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

From lefty Jewish gathering site to hip cultural site in just 80 years.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

An ancient monastery, a locked room, and a mysterious book heist.