Andrew Collins wrote an interesting book several years back about Cuba may being a surviving part of Atlantis. Guess it’s not completely impossible — Cuba isn’t tremendously far from Bimini, which Edgar Cayce said would be the first indicator of Atlantis rising (beginning in 1968-1969).
I recall a report many years ago - that described a discovery of megalithic looking structures in that same area. I believe it was a group paid to do exploration for oil.
The story came out then disappeared. I think it was from the 90’s.