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

Greenland is the world's largest island — Australia is considered a continent.

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

Iceland is home to more than 100 volcanoes and experiences an earthquake almost every day.

The Earth's crust is divided into tectonic plates.

The tallest mountain above sea level is Mount Everest.

The CN Tower in Toronto was once the tallest free-standing structure.

Sudan has more ancient pyramids than Egypt — over 200, though smaller in scale.

Akrotiri was preserved under volcanic ash on Santorini.