Well Tom there is actually a ruined city in Central America which had/has canals roadways and a seaport that was definitely inhabited prior to being covered by Volcanic Eruption flows. <br>Here's the kicker the lava flows are geologically dated to being a minimum of over 11,000 years old and that the flows were not what caused the city/civilization to fall meaning the lava and volcanic eruptions were post demise of the city. What is known is that there was a very large war that took place (again this is prior to at least 9,000 BC) and that the war is what led to the demise of this location.  [I tried putting the geo-coordinates on youtube but it thinks its some spam the location is in Guatemala with additional systems complexes in Belize. It is not Tikal.]