A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

The world's largest single-aperture telescope resides in the Canary Islands.

This sign designates the road that leads to the infamous Area 51.

A museum of space exploration in the UFO capital of Japan.

Established over a thousand years ago, this family-run teahouse continues to serve skewers of sweet rice cake to this day.

Located more than 600 feet beneath the North Atlantic seabed, this tunnel boasts the world's first undersea roundabout.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

One of only a handful of seaside temples in Korea, this sacred space is home to a legendary healing Buddha statue and a traffic safety prayer pagoda.

Known as the birthplace of Korean Buddhism, this temple features an ancient, five-story stone pagoda.

It's believed that these columns marked the end of the Via Appia.

This massive neon wheel is the only one of its kind to be built over a bridge.

The world's tallest circular building is loaded with symbolism, but many just see a big donut.

The once highest point in China blends symbolic design with a kick of adrenaline.

One of the world's largest ice festivals dazzles visitors for over a month with radiant sculptures and carvings.

These layered sandstone mountains in China look like they are made of pressed crayons.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

This abandoned fishing settlement may well be the greenest village in the world.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

For millennia, explorers were obsessed with discovering the source of the Nile—is this small mountain stream really the answer?

This futuristic building is yet another architectural wonder in Dubai.

With only one flight in and out a week, the unfenced runway at this small island's airport transforms into a seaside park for locals and visitors.

A bibliophile's heaven that contains hundreds of bookstores, offering over a third of secondhand books for sale in Tokyo.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.