The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

This groundbreaking 16th-century map is known as "America's birth certificate."

Lonely minaret stump of a destroyed city.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

Glacial lake that mysteriously empties itself every year.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

The controversial final resting place of the equally controversial first president of Turkmenistan.

A dictator's gold statue once rotated to face the sun on a 75-meter high marble tower.

Sumptous memorial to a controversial independence.

An eccentric dictator's take on a Turkmen version of Disneyland.

If you want to get married in the White Marble City of Ashgabat, you should do it in this surreal disco ball building.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

The heartbeat of modern Uzbekistan’s thriving market culture.

Home to what was once considered the largest gate in central Asia.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The Avenue of Mausolea is a series of grand palatial tombs.

Light still pours into the ruins of this ancient Islamic observatory.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Climbing Iceland's highest peak on the rim of the Oræfajökull volcano.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.