Chariots of the Gods - Von Däniken offers the following theories:
The tomb of Mayan ruler Pakal (603-683 CE) in Palenque, Mexico. Interpreted by von Däniken as depicting an astronaut in his spaceship. The existence of structures and artifacts have been found which represent higher technological knowledge than is presumed to have existed at the times they were manufactured.
Statue from the late Jōmon period (1000 - 400 BC) in Japan, interpreted by Daniken as depicting an alien visitor. Interpretations of ancient artwork throughout the world as depictions of astronauts, air and space vehicles, extraterrestrials, and complex technology. Däniken also describes elements that he believes are similar in art of unrelated cultures.
The Nazca lines (200 BCE - 700 CE) in Peru, interpreted by Daniken as landing strips for alien visitors. Explanations for the origins of religions as reactions to contact with an alien race, including interpretations of the Old Testament of the Bible. According to von Däniken, humans considered the technology of the aliens to be supernatural and the aliens themselves to be gods
Scientists and historians have rejected his ideas, claiming that the book's conclusions were based on faulty, pseudoscientific evidence.