I realize that you may have looked at these photos as I am slow with adding the text, and have no idea what they are!!
The Nazca Lines phenomenon is similar to that of crop circles - there have been lots of suggestions as to how they were created, but no-one really knows.... But what they are are shapes created on the ground that can only be seen from the air. Stones have been cleared to create the lines and we took a 30 minute flight to see them all.