Louise Bourgeois' 30-foot-tall steel spider sculpture.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

Montreal's colorful subway station shows its support of the local LGBT+ community.

Every year, the colorful murals of Montreal get a complete makeover.

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

This 1967 experiment in modular architecture was designed to be a new model for urban living.

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

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Two thirds of this Montreal neon icon has survived to flash another day.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

Got apples?

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The celebrated eyesore created by starry-eyed sweethearts.

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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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