This video gives an interesting theory as to where the lost city of Atlantis was (a location known today as the Eye of the Sahara), and it seems to be a pretty reasonable conjecture. What is relevant to this group however is how it might have been destroyed by a tsunami caused by a massive landslide in the Mediterranean — which is especially notable because the location is a great distance away from the Mediterranean, yet the evidence points to such a tsunami flooding a path all the way across Africa to the Atlantic, regardless of whether the city of Atlantis was in that path.
I think of our interconnected world today and wonder what would happen if such an unexpected event were to happen now, targeting a region that was in some way or another vital to modern civilization (such as with a concentration of all talent in an important field) without any suitable alternatives available.
This is one reason why I think it is dangerous to rely on trade networks that stretch to the opposite side of the earth for vital sectors such as food or energy.