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.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Erotic art covers the walls of the largest ancient pleasure palace.

The ancient latrines of the Greeks, in all their public glory.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

A museum devoted entirely to the rattlesnakes and snake-related art.