The "Rocky Horror Picture Show" character has a hidden camera that broadcasts people doing the "Time Warp."

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

French Time Capsule-19th Century home revealed to the public.

This 1,400-year-old abbey was once a powerhouse for music and intellectualism known across Normandy.

His "Lionheart" is entombed separately from the rest of his body.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

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

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

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

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

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

A museum of carnival attractions where you are invited to ride the rides.

Abandoned railway line circling the city of Paris.

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

Erected in 1803, it is the first astronomical observatory that was built in the Americas.