Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

This public Skyspace created by artist James Turrell for his alma mater puts on a show every day at sunrise and sunset.

One of Canada's tiniest museums tackles the world's largest turtle.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Rome’s legendary peephole vista is also a former Crusader stronghold.

Breathtaking and huge 430 year old maps of Italy.

The largest flower auction house in the world.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

New York City's smallest piece of private property.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

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

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

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

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

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

The only town in the world with two exclamation points in its name.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

Experience what life was like in Ireland during the Viking and medieval ages.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.