Nasca Lines are a set of simple geometric designs: trapezoids, straight lines, rectangles, triangles, and swirls. Some of the swirls and zigzags start to form more distinct shapes: a hummingbird, a spider, a monkey. These are located just over 200 miles southeast of Lima, near the town of Nasca.
In total, there are over 800 straight lines, 300 geometric figures and 70 animal and plant designs, also called biomorphs. Some of the straight lines run up to 30 miles, while the biomorphs range from 50 to 1200 feet in length (as large as the Empire State Building).
Paul Kosok, an American historian from Long Island University, is credited as the first scholar to study the Nazca Lines at length. The purpose of these lines have been a topic of debate and research.
Research over the years have suggested that the purpose is related to Astronomy, Constellations, Irrigation, Agriculture, Rituals, Mummification etc. Recent research, based on evidences of animal depictions (fertility symbols for rain, water) have concluded that maybe the lines indicate ritualistic practices for the gods.