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

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

There are places on Earth that have never been explored.

The longest cave system in the world is Mammoth Cave in Kentucky.

The Channel Tunnel links the United Kingdom and France beneath the English Channel.

Your existence required Earth to remain habitable for billions of years.

The Great Rift Valley in Africa may eventually split the continent in two, forming a new ocean in millions of years.

The country of San Marino claims to be the world's oldest republic, founded in 301 AD.

The Nile River flows northward into the Mediterranean Sea.