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

Ancient barriers wrap around what was once an important stop along the Silk Road.

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

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

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

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

A sliver of nostalgia in Seattle's Viretta Park.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

The highest point in Washington state is a volcano covered in glaciers.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A giant Troll lurks under one of Seattle's oldest bridges.

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.

A huge monument to a bizarre book written by Turkmenistan’s longstanding dictator.

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

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

A cemetery with goat-horn bedecked gravestones.

A fiery crater has been burning in the Karakum Desert since 1971.

Sumptous memorial to a controversial independence.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.