I always enjoyed watching shows that tried to state ‘we don’t know’ about something I had studied for decades. Leonard Nimoy In Search Of was one of those programs. There were programs about Nazca, Inca, etc. One was about the Inca construction, that they did not use classic mortar between large rocks and boulders. The boulders fit perfectly with each other. The classic ‘did aliens show them how’ was so bloody ridiculous. All it took was a little leg work. We found one of the many quarries the natives, not the aliens, used. They cut large boulders, put sand on the top of the boulder, then put another boulder on top of the sand. Wherever the sand was not pulverized, that part did not meet and fit perfectly. They would sand down that part, and repeat the process, until all the sand was pulverized.
As far as Nazca lines and characters, one does not have to be an alien in orbit to see them. Stand on a tall hill or mountain, and one can see them. My favorite is the huge spider. There was a lady who spent decades studying and investigating. Turns out there are 3 lines through the spider, and if one stands on the hill looking down at the spider and the lines, one witnesses the constellation Orion rising at certain times of the year. Whether it is for religion, planting, the harvest, or a combination, I do not know. But aliens? Nah!
I’ve always thought the ancient aliens theory was an insult to the intelligence and capabilities of the ancient peoples.
Decades back, an archaeologist studying the shapes found relatively small practice models of some of the more complicated shapes. Also found that the terrain was soft, and joked that the aliens’ chariots wouldn’t have found them to be much of a runway.
It’s always been a mystery to me why anyone believes critters with interplanetary capability would come all the way here to screw around with stone masonry, or even stone moving or crop circles. :^)