The Nazca Lines of Peru
There are random lines that run for miles in the Peruvian Desert. They create wide geometric forms of birds, monkeys, shapes, and symbols. All of these can be seen from the sky. Some people think that the Nazca people of Peru were trying to communicate with gods, or maybe even aliens.
The lines cover an area of nearly 1,000 sq. kilometers. Some of the lines measure 30 meters wide! These images are only visible while in the air or on specific hilltops.