Perpendicularity.org
It is merely quintessential quaintness in a vertical, upright rectitude
towards a grammatical virtue that  leads into free-spirited expression.
Aliens from another world?  Were the first earthmen astronauts?
This is another one of those great mysteries that have many of the ancient astronaut theorists all
riled up with excitement and curiosity.  Of course, many people will come up with any mundane
excuse they can imagine, just to try and deny the possibility of extraterrestrial life ever visiting
Earth in the past.  However, more and more evidence seems to point more in favor towards the
belief that the first Earthmen may have actually been
ancient astronauts travelling from another
world.  The impact they had on mankind may be more than what some give credit for.  In my opinion
along with many others, the proof is not only in a lot of ancient artifacts and mysterious structures
built with advanced technologies, but also in
ancient texts.  Hell, even the Bible has references to
UFOs and space travellers, sort of like the beginning of the
Book of Ezekiel, for example.

Anyway, this page is going to provide a couple resources and a few images of the Nazca Lines
found in Peru, which is associated with the Inca civilization.  Related links:  
Lost City of the Incas,
and
Incas - Aliens & Ancient Astronauts.

An excerpt from Wikipedia:
"
The Nazca Lines are a series of ancient geoglyphs located in the Nazca Desert in southern Peru. They were designated a
UNESCO World Heritage Site in 1994. The high, arid plateau stretches more than 80 kilometres (50 mi) between the towns
of Nazca and Palpa on the Pampas de Jumana about 400 km south of Lima. Although some local geoglyphs resemble
Paracas motifs, scholars believe the Nazca Lines were created by the Nazca culture between 400 and 650 AD. The
hundreds of individual figures range in complexity from simple lines to stylized hummingbirds, spiders, monkeys, fish,
sharks, orcas, llamas, and lizards.
The lines are shallow designs made in the ground by removing the ubiquitous reddish pebbles and uncovering the whitish
ground beneath. Hundreds are simple lines or geometric shapes; more than seventy are zoomorphic designs of animals
such as birds, fish, llamas, jaguar, monkey, or human figures. Other designs include phytomorphic shapes such as trees
and flowers. The largest figures are over 200 metres (660 ft) across. Scholars differ in interpreting the purpose of the
designs, but in general they ascribe religious significance to them.
"  
Read more, here:
http://en.wikipedia.org/wiki/Nazca_Lines

This subject gets even more interesting when you start reading about all the different theories
that try to explain the reasons for the formation of these Nazca Lines and who all may have
possibly been involved in these creations, and why.

For example:  Jim Woodmann believes that the Nazca Lines could not have been made without
some form of manned flight to see the figures properly. [I'd say that is a safe conjecture] Based on
his study of available technology, he suggests that a hot air balloon was the only possible means
of flight during that time.  Many people reject that notion, simply due to the lack of proof that such
balloons existed during that time.  It seems more like he wanted to dismiss the belief that any
aliens could have been involved, but still couldn't deny the fact that it was done from the air.

Swiss author Erich von Däniken suggests the Nazca lines and other complex constructions
represent higher technological knowledge from extraterrestrial beings. Von Däniken maintains
that the Nazca lines in Peru are runways of an ancient airfield that was used by extraterrestrials
mistaken by the natives to be their gods.  Erich von Daniken along with many other ancient
astronaut theorists seem to be on a plausible path of rationale, in my opinion.

There are too many theories to list, but if you search the web about it, you'll find some ridiculous
ideas and beliefs, as well as some very good possible explanations for this mystery.  There are
some people that believe a race of giants made the Nazca Lines, for example.  Who knows...
Were the Nazca Lines created by ancient astronauts / aliens?
If you've missed the introduction and would like to know why these stories & articles began on this website, click here to begin.
These maps were provided by the informative website "Crystalinks."  
The Lines were allegedly made by removing the iron-oxide coated
pebbles which cover the surface of the desert. When the gravel is
removed, they contrast with the light color underneath. In this way the
lines were drawn as furrows of a lighter color. Off the Pampa, south
of the Nazca Lines, archaeologists have now uncovered the lost city
of the line-builders, Cahuachi. It was built nearly 2,000 years ago
and mysteriously abandoned 500 years later.
The Nazca Lines were first spotted when commercial airlines began
flying across the Peruvian desert in the 1920's. Passengers reported
seeing 'primitive landing strips' on the ground below. Today people
sometimes fly in hot air balloons to view the splendors of the Nazca
Lines, their energies awakening something within their souls.
Read more, here:  
http://www.crystalinks.com/nazca.html
Check out some sample images of the Nazca Lines, below:
Well, to finish up with the resource links, I'll post another link to an informative page about this subject, as
an image credit for the two Maps of the Nazca Lines, located below:
Check out a sample video, to boost your curiosity about the Nazca Lines, below:
In closure, one thing seems to be for sure:  If you can't really notice or make much sense out of the Nazca
Lines unless you are looking down while being high in the air, then one can only wonder if they were built
from the air by way of, uh, ancient astronauts and/or
aliens using spaceships, etc.
Look below, for the complete list of chapters on this ancient astronaut topic. Cheers!
Will the Colonization of Mars be possible for Humans?
DVDs related to Aliens & UFOs