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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

This demon atop the Notre-Dame de Paris looks utterly bored.

Site of one of World War I's most horrific scenes.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

One of the largest underground systems runs under Canada's largest urban center.

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A school teacher's massive and terrifying self-built castle.

A swath of France so devastated by war it is still forbidden to go there.

Built in 1512, the oldest cathedral in the Americas.

A remarkable range of flora and fauna are represented in this Dominican nature preserve.

This replica of the Greek structure is in the heart of Nashville.

This natural sea cave hides a small wonderland of natural turquoise beauty.

Little island known for its massive beachfront "flowerpot" pillars.

Possibly the world's largest coin stands just outside of a Canadian science center.

Cape Breton landmark filled with recognizable faces.

This Canadian monument to the man who invented the telephone allows visitors to get up close and personal with the artifacts of his life.

On the waterfront of Sydney, Nova Scotia, a 60-ft. fiddle greets incoming ships.

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

Canada's subterranean Cold War museum has doubled as a movie set.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.