Can you name the giant geometric figures etched on the ground that are one of archaeology's greatest enigmas and where they are located?

The Nazca Lines, located in Peru, and scratched on the surface of the ground between 500 B.C. and A.D. 500, are among archaeology's greatest enigmas. The geoglyphs depict living creatures, stylized plants and imaginary beings several kilometres long and are believed to have had ritual astronomical functions. The president of Peru is Ollanta Humala Tasso. Source: UNESCO - World Heritage Center