An endless sea of white conical domes.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

Where thousands of slaves passed through the "Door of No Return."

The Voodoo Superstore of the world.

Ancient Egyptian relief, claimed to depict an electrical light.

The largest known Ancient Egyptian obelisk.

Even King Tut was intrigued by the glass of the Great Sand Sea.

Land that belongs to no nation.

The most alien-looking place on Earth.

A city built from mud and known as the "Manhattan of the desert."

Remains of an abandoned coral city.

One of the most remote and isolated villages on the Arabian Peninsula.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

Spirits from these lakes are said to produce the local weather and odd phenomena as they bicker between themselves.

These Nubian pyramids are strange and unique, even by pyramid standards.

The world's largest bioluminescent area was undiscovered by science until 2005.

The “Thumb” of Mauritius provides a 360 degree view of the entire country.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

This small group of sand dunes manages to pack in a strange rainbow of colors.

The world's first and only natural nuclear reactor.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.