Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

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

For millennia, explorers were obsessed with discovering the source of the Nile—is this small mountain stream really the answer?

This century-old site established by King Mwezi Gisabo preserves the art of Burundi's ancient drum rituals.

In this African village, the walls of the chief's compound are painted with beautiful traditional designs.

These mysterious 1,000-year-old walls have revealed little about their past.

The historic cave is both a symbol of superstition and black magic and inspired one of the early Christian converts in Botswana.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

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

Wondrous stalactites house thousands of bats in these African caves.

Does this 10-foot-tall statue carved into a rock face depict a king afflicted by a skin condition or a Buddhist figure?

A shoreline exhibit describing the disastrous first attempt by the French to colonize North America.

The precious-metals strikes dating back to the 1860s are now mostly inactive, but this area has become the United States' only domestic source of lithium.

The largest model carrot in the world.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Overflowing with shipping containers, this location has been transformed into a massive workspace for artists.