Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.

3/4-scale model of the White House in Atlanta, Georgia.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A bizarre collection of gifts to North Korean dictator Kim Jong Il from the despots of the world.

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

This derelict superstructure was a very important warning system for the Soviet military.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A small part of Russia that does not touch any other part of Russia.

This small cemetery is all that remains of Atlanta's first Black communities.

A monument celebrating the idea of reaching inaccessible places.

This subterranean necropolis holds three floors of antler-dug grave caves.

The world's most active stratovolcano is almost always erupting.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

This Arctic storage facility is a secure backup for agricultural biodiversity.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.