"In 1848, an archaeological expedition working in Egypt discovered strange hieroglyphs on a ceiling beam at an ancient temple in Abydos, several hundred miles south of Cairo. The hieroglyphs were carefully copied and brought back to Europe. The mysterious images gave rise to heated debate amongst Egyptologists. Eventually, however, they were dismissed as bizarre objects that nobody could adequately explain and were forgotten. In the mid 1990's photographs and videos, taken primarily by tourists who had visited Abydos, began to appear on the internet. They depicted the 'strange machine hieroglyphs' originally discovered in the nineteenth century. The temple in which they were found was built by Pharaoh Seti I around three thousand years ago. To the modern viewer it is clear that the strange machines, so mysterious to the Victorians, are in fact various types of flying craft and a tank. One of the aircraft is a helicopter. There is no mistaking it. It has a rotor blade, cockpit and tailfin typical of a modern battle helicopter. On the face of it, this is one of the most astounding discoveries ever to have been made in Egypt. [...]
http://www.hallofthegods.org/articles/mystery-abydos.html
"Is the concept of an airplane limited to Egypt? That doesn't seem to be the case. Gold trinkets [with remarkable resemblance to a modern aircraft or spacecraft] were found in an area covering Central America and coastal areas of South America, estimated to belong to a period between 500 and 800 CE, but since they are made from gold, accurate dating is impossible and based essentially on stratigraphy which may be deceptive. However, we can safely say that these gold objects are more than 1000 years old.
[...]
There seems to be no doubt that Vimanas ["Rama Empire" of Northern India and Pakistan ] were powered by some sort of "anti-gravity." Vimanas took off vertically, and were capable of hovering in the sky, like a modern helicopter or dirigible. Bharadvajy the Wise refers to no less than 70 authorities and 10 experts of air travel in antiquity. These sources are now lost [although drawings were done from the texts in 1923; see link for photos].
http://www.world-mysteries.com/sar_7.htm