The Lena River in Siberia forms one of the world's largest river deltas — and freezes solid each winter.

Petra in Jordan was carved into rose-colored rock cliffs.

Iceland sits directly on the Mid-Atlantic Ridge and is actually spreading by 2.5 cm per year as two tectonic plates diverge.

The Amazon River discharges more water than any other river.

The Eiffel Tower can grow over six inches taller in summer.

The Millau Viaduct in France is one of the tallest bridges in the world.

The Arctic experiences months of continuous daylight in summer.

Antarctica is technically a desert because it receives very little precipitation.

There are more than 17,000 islands in Indonesia — making it the world's largest archipelago country.