The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

The world's most famous cheese caves.

A bike train runs along a disused railway line through the tranquil French countryside.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Statue of death tucked in the University of Medicine courtyard.

Peruse produce from Senegal, Cameroon, and other West African nations at this sprawling market.

Shop at the 200-year-old store where Julia Child stocked up on copper cookware.

Order a boozy baba au rhum at the oldest patisserie in Paris.

For those late-night mollusk cravings.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

Where visitors can play more than 150 retro arcade games.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A memorial to the beloved brown bear that served in the Polish army during World War II.