This elaborate towering structure was once famed for its revolutionary height.

Three prestigious academic collections come together to create a world-class natural history museum.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

What is it about mushrooms that makes people wish they lived inside of them?

This massive airship factory is so large that it has its own indoor weather.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Mysterious stone tower featured in many alternative histories of the New World.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

Morocco's Argania trees are infested with nut-hungry goats.

Vast stretch of tide-pools with a unique Moroccan charm.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Mysterious meeting place for UFO hunters near Area 51.

An eatery for UFO seekers on the Extraterrestrial Highway.

The glowing blue Nymphaeum of Emperor Tiberius.

The Emperor Tiberius' palace of debauchery.

Ancient snack bar of the Roman Empire re-opened.