The Sahara was a lush, green savanna as recently as 5,000 years ago.

The Amazon River is one of the longest rivers in the world.

Fact #72 · Geography

The Andes are one of the longest mountain ranges in the world.

Fact #55 · Geography

Sudan has more pyramids than any country in the world.

Fact #2607 · Geography

There are caves on Earth so deep they have their own weather systems.

Fact #2234 · Geography

The city of Istanbul spans two continents — Europe and Asia.

Fact #3751 · Geography

The Sahara Desert is roughly the same size as the United States.

Fact #3910 · Geography

Greenland is the world's largest island and is covered by an ice sheet containing 10% of the world's fresh water.

Fact #4274 · Geography

The Amazon rainforest spans nine countries.

Fact #103 · Geography