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

The Trans-Siberian Railway is one of the longest railway lines in the world.

The shortest commercial flight in the world operates between two Scottish islands — Westray to Papa Westray — lasting about 90 seconds.

The Earth's crust is divided into tectonic plates.

The Nile River has supported civilizations for thousands of years.

Mount Everest grows slightly each year due to tectonic activity.

Antarctica is technically a desert — it receives less precipitation than the Sahara in many areas.

There are abandoned cities hidden around the world that were evacuated suddenly.

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