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

Saint Borromeo often prayed in this austere crypt during the 16th century.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

A French museum of wrought iron.

An ancient ossuary in Rouen.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

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

A historic Montreal market that was the city's agricultural hub for over century.

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

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A contemporary fresco movement illustrates the region's rich history.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

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

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

A hat for every occasion can be found in this British Columbia haunt.