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

The hottest place on the planet.

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

Rimmed by white crusts of salt on every edge, Lac Assal is one of the saltiest bodies of water in the world.

Scrap material from around Eritrea finds a new life at this outdoor market, where upcycling is a lifestyle.

Wander among hulking piles of rusted machinery left over from the Eritrean-Ethiopian War.

Eritrea's futuristic gas station is a nod to Italy's fascist history.

A state-of-the-art medical facility dedicated to treating beloved birds of prey.

A superb spot to appreciate the traditional boats of the Indian Ocean.

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

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

A 19th century pearling and fishing village abandoned before Qatar's economic boom.

The building is a gigantic piece of art inspired by the shape of a desert rose.

Qatar's oldest market can trace its origins back more than a century.

In Oklahoma City's Bricktown, there's a street that don't use jelly.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This former mining railroad is one of the best-preserved short lines in North America.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

In 1847, Brigham Young climbed this hill to survey the Salt Lake Valley and saw a fine place to build a city.

This mural changes every few years.

This former wildlife sanctuary is being transformed into an art park.

Almost all that remains of a town dedicated to supporting the First Transcontinental Railroad.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.