docu on national geographic. when i first heard about it i was skeptical but they gave a good case. they say its in southern spain and continues into the atlantic. showed satellite view of the ringed walls like plato spoke of. much methan gas trapped under surface which is what would happen if life ended and became encase suddenly. i could be mistaken but i think i heard an estimate on the spot being 5000-7000 years old, not sure though.
more north is what is believed to be a monument mini deplica of the destroyed city.
much excavation is needed. it will be many years. i was skeptical when i first heard but i think it may be it.