Atlantis May Have Been Found...

In present day Indonesia. If true, it was located on what we now call Sundaland. A vast expanse of land that sank below the sea following the Younger Dryas celestial impact that caused mass melting of our ice sheets at the time and rose the sea levels over 100'.

This group of people will have been global travelers, and what I propose is that when their homeland sank, a lot of them made their way to South America. Others still went to Australia and integrated with the aboriginies (who later themselves made their way to South America, as evidenced by recent genetic tests revealing that certain South American indigenous peoples are closest related to the Aboriginies). But it was in South America that we find many commonalities with their homeland, namely their extensive and ingenious use of canals for irrigating crops.

Others still appear to have made their way all the way around to Northern Ireland where they became known as the Tuath De'.

And everywhere they went they set about the task of building megalithic monuments meant to warn us of reoccurring calamities brought to this planet from the cosmos. Like clockwork. So they built clocks. Which is exactly what the GP of Giza is.

A couple of things should bear true if this antidilluvian culture was real.
1. All megalithic monuments shall have profound astronomical significance.
2. We should be able to find linguistic commonalities between Native American cultures and other cultures in Indonesia and Egypt, among others.