Finti, you said what I wanted to say (and I was preparing this stuff in my head all the way to your post). Anyway, the Minoan city of Akrotiri on Santorini (which was Thera) was destroyed when the volcano erupted and half the island imploded. The resulting tidal wave hit the Minoan civilisations on Crete which is 70 nautical miles away. Interestingly, they never found any human or even animal remains at Akrotiri which is still perfectly preserved due to the ash from the volcano. It is therefore believed that the Minoans at Akrotiri fled the island and ended up somewhere (probably dead - see tidal wave description). It was widely believed that this was Atlantis (see implosion detail). However, it has also been debated that Atlantis was close to Indonesia somewhere. There seems to be some kind of proof that a "great trek" took place over Siberia or Mongolia or something (shit, I really can't remember). So that's my piece of the puzzle.
If it helps at all, I once dreamt that I lived underwater and could breath normally without Scuba gear. Someone mentioned that somewhere.