Rather then give you a long commentary let me just tell you a few facts:

1.They really are not sure when these were done but it is at least 2 thousand years ago and they believe it was the Nascas, again they are uncertain.

2. It was discovered in the early 1900 when they were looking for more aqueducts built by the Inca and the Nazca Natives, an airplane was being used.

3. It can only be seen from the air, yes there are mountains near by but you still wouldn’t see all of them, actually not most of them.

4. A German mathematician studied the lines most of her life until she died at the age of 95, still no real conclusion of what or why.

5. Parts of it look exactly like an airport and runways, in fact from a reasonable altitude you could not be faulted for believing that.

What do I think? Not an airport but a copy of one. They were trying to attract their gods so they built what they believed the gods wanted so they copied it from somewhere, someone or something. It is as good a theory as any of them in my opinion; now if you want to know where I this great insight  I must simply direct you to watch “Ancient Aliens” so that so too can be as informed as I am!!! Kidding aside this site is a must see in a life time.