Nazca Landscape Aerial

Aerials of the Nazca lines which are only visible from the air and form perfect geometric designs such as triangles and rectangles and straight lines running for several kilometers across the desert.  <br />
Some are animal shapes such as a monkey, a lizard, a condor--that are 90 to 180 meters long.  There is no proof but the most popular thought is that they were made by the Nazca and Paracas cultures during the period between 900 BC and 600 AD. Maria Reiche, a German mathematician who spent much of her life studying the lines considers the lines to be an astronomical calendar for agricultural purposes.  They are made by exposing lighter colored soil when sun-baked stones were moved and piled up.