The world's first and only natural nuclear reactor.

An ocean in the making, in the Ethiopian desert.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

The hottest place on the planet.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

The deadliest diving spot in the world is also a stunning geological marvel.

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

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

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

An endless sea of white conical domes.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

Deadliest lake in the world suffocated over 1,746 people in one night.

There is only one place in the world where the corners of four nations come together.

Birthplace of America's first documented serial killer.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Beautiful natural falls where Satan once ruined a pot of beans.