The ruins of this mining boom town stand like skeletal reminders of the settlement's dark history.

Ancient artists in the middle of nowhere.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

This restored eighth-century palace is a shining example of ancient Umayyad architecture.

An oasis of shade and color amidst the bustle of the old city.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

An ancient capital city that dates back 3,000 years and harbors many surprises.

A more chill but no less fascinating version of the famous ancient archeological site.

Bell tower juts out from a village buried under a lake.

The home of half the world's population of critically endangered mountain gorillas.

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

The culture that built these Tanzanian ruins displayed advanced knowledge of irrigation technology before mysteriously disappearing.

This rare volcano spews the strangest and (literally) coolest lava in the world.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

An aeronautical-themed resort forged around rusty relics from the golden age of air travel.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Brought to you by the makers of fiberglass dinosaurs.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.