This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

An island made out of shells, including a cemetery.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

The Earth's saltiest natural body of water belches toxic gas.

Ethiopian standing stones featuring remarkably preserved carvings of swords and people.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

Strange sandstone canyon known as the "place broken by itself."

The Kenyan town where the best distance runners in the world are trained.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

The world’s largest permanent desert lake is a UNESCO World Heritage Site.

Rusting railcars and locomotive equipment fill this Ethiopian train graveyard.

Massive stele returned to Ethiopia after 70 years in Rome.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

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.

Reaching the "Church in the Sky" requires scaling the cliff face of a sandstone pinnacle with a 650-foot drop.

Over the dunes of the Empty Quarter, the mysterious music of the desert.

Whitewashed mosque contains the world's largest carpet.

One of the largest sand dunes in the world is nicknamed the "Scary Mountain" due to its steep slope and sharp incline.

An abandoned desert hamlet swallowed up by sand.

The world's largest frame offers spectacular views of the city's past and present.

Groups of prehistoric tombs that dot the mountains of northern Oman.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

This bazaar is one of the oldest in the Arabian world.