This is one of those speculative technology ideas that I find fascinating, the possibility that ancient civilisations may have had the technology to fly.
The lines and designs on the Nazca plains appear to have been drawn to be visible from the air and this has given rise to many “ancient astronaut” type of theories but it is possible that the inhabitants may have flown themselves using what are sometimes referred to as “smoke balloons”.
These are essentially hot air balloons where the fabric weave is sealed by using a smoky fire to deposit soot on the cloth. This same method was used by the Montgolfier brothers in their early balloons where they reportedly used old boots and rotten meat to create a smoky fire before launching.