From mining complex to industrial exhibition, this museum once played a major part in the X-Files.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

The best place for scenic views of the DMZ and North Korea.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

This museum showcases the art of ancient sword-making.

Secret North Korean passage discovered below the world's most dangerous border.

This artificial ring island was built to hold cubic tons of polluted dirt.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Yup, that's a 330-foot yacht passing over the highway.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

Go inside to really appreciate this 500-year-old technological masterpiece.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.