Over Christmas, I was watching a fascinating show that featured a team of scientists charting undersea topography maps in the caldera of Santorini, the volcano that destroyed the Minoan civilization.
Looking at the caldera, I had always wondered why more hadn't studied what the original topographical features once looked like. The volcanic eruption destroyed much of the original landscape, but you can imagine that it could have contained Plato's concentric circles.
Well, the study showed that Santorini was indeed laid out in concentric circles -- just like Atlantis. If the evidence before wasn't convincing enough, I now have no doubt now that Plato was referring to the eruption of Santorini when he spoke of Atlantis. It all makes sense.
The ancient Egyptians did trade with the Minoans and it's documented that Egypt was hit hard by the eruption. And other scientists have speculated that the eruption was the cause of the later plagues documented in the bible.
The Atlanteans/Minoans were certainly advanced for their day. They had an impressive fleet of ships and were a major trade destination. They had plumbing that allowed fresh water into households, along with intricate waste disposal systems and subterranean sewers. Many of their structures were seismic resistant, and they had interesting light and air flow control. I think they're also credited with developing the first written language in Europe. A very advanced civilization.