This former train tunnel is filled with lines from a poem crafted by Robert Louis Stevenson.

Home to the longest wooden escalators in the world.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A memorial to two dedicated postal workers who lost their lives delivering mail.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

The only statue ever crafted by award-winning animator Ray Harryhausen.

This post-war motel embodies a little-known, Miami-born architectural style.

An intricately carved Viking church overlooks a glistening fjord.

Edinburgh’s version of the Sistine Chapel is this former church, with an interior covered in paintings done by one woman over the course of nearly a decade.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A 15-foot-tall statue of the head of the Sopranos family greets passengers at a train station in southeastern Lithuania.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

Dedicated to the writer who immortalized the use of the poppy as a symbol of remembrance of those who died in wars.

The location where the iconic movie character declared it was time to go home.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.