That is interesting -

In a groundbreaking revelation, researchers have unveiled the discovery of a vast submerged land to the north of contemporary Australia, that held up to 500,000 people. Submerged due to rising sea levels at the conclusion of the last glacial period, the researchers propose that echoes of this forgotten land resonate today within indigenous mythology.

The old question about Atlantis - real or mythical - comes up again and again in many places.

I recently started watching an old National Geographic series called Drain the Oceans that gives a look at things as they might appear were the water removed. Simple concept, I'm sure there is a lot of LIDAR and such involved.