This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

For decades, a bottle factory dumped their waste into these waters—now it's considered the best sea glass beach in England.

As part of an 800-year-old tradition, a man parades through town covered in a suit made out of spiky burrs.

This large, circular tomb is the final resting place of the first emperor of Rome.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

A historic freight system that found the true gold rush is in tourism.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

A magician and his beloved, pampered canine were buried together, within days of each other, due to a tragic twist of fate.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

A huge musical instrument played by the ocean.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A tunnel with windows, so you don't miss out on the impressive views.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Denmark’s never-ending bridge.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

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