The Dead Sea lies at one of the lowest elevations on land.

The Nile flows northward — it is one of the few major rivers in the world that flows from south to north.

The Palm Islands in Dubai were constructed using land reclamation techniques.

The Sahara Desert was once home to large lakes and grasslands.

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

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

Angel Falls in Venezuela is the world's highest uninterrupted waterfall at 979 meters.

Akrotiri was preserved under volcanic ash on Santorini.

The Atacama Desert in Chile is the driest non-polar desert on Earth — some weather stations there have never recorded rain.