A diminutive, thousand-year-old church believed to be the smallest in Ireland.

Eighty million natural history specimens call this gargantuan museum home.

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

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

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.

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

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Massive galleon from a box-office bomb docked in Genoa.

This former hub for crafty philosophers was founded by a writer who died aboard the infamous RMS Lusitania.

Over 50 whirling pools left behind from the glacial age.

Books you don’t need in a place you can’t find.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Famously misunderstood wonder of the ancient world

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

One of England's most famous churches hides a pair of little known architectural treasures.

This skewed English house has looked like it's going to fall over for centuries.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.