Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This town at the north edge of Myrtle Beach holds a wealth of Black history.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

This former sugarcane transport tunnel is now a portal to a lovely beach.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A hidden three-foot-wide house separates these two regal churches.

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

The highway's southernmost spot is a beloved local attraction.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A massive Montreal stadium that has seen nothing but trouble since its inception.

The biggest museum dedicated to insects in North America, one of the largest in the world.

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.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

The corpse bride of Portugal.

Pagan monument converted to Christianity with the population.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”