Each year, the monsoon season in South Asia affects the lives of over 1.5 billion people.

The Petronas Towers were once the tallest buildings in the world.

There are more pyramids in Sudan than in Egypt — the Nubian pyramids number over 200.

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

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

The London Underground is one of the oldest metro systems in the world.

The Nile is generally considered the world's longest river, but some measurements put the Amazon ahead depending on source point.

The Pacific Ocean borders more countries than any other ocean.

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