I just heard about a documentary on the Nazca lines on National Geographic Channel. It's called Nasca Lines: Buried Secrets. I haven't seen it and don't have cable but the trailer looks pretty sweet (very dramatic music) Check it out the show and let me know what you think so I can go out and try to find a pirated copy of it in the market.
Here's a link to the trailer and more info about the show: http://www.edgewest.com/?p=102
Here's when it's running.
2/25, 7 PM EST
2/25, 10 PM EST
2/28, 12 PM EST
3/4, 3 PM EST
If they show a hil top with three big triangles, I live in the small town that's right next to them.