The Nile River flows northward into the Mediterranean Sea.

Countries with extremely high tax rates sometimes collect less revenue than countries with moderate tax rates.

The Three Gorges Dam spans the Yangtze River.

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

The United States has no official language — English is the dominant language but is not legally designated.

Norway has a town called Å.

Mongolia is the world's least densely populated country, with about 5 people per square mile.

Mount Etna in Sicily is Europe's most active volcano and has been erupting continuously for at least 2,700 years.

New Zealand was the first country to give women the right to vote, in 1893.