What scientists and others seem to forget is that during periods of the past ice ages, sea level was as much as 400 feet lower. Vast areas of what is now sea floor were exposed and you could walk to current islands or have short raft trips. As the sea level rose, islands became smaller and species that required less territory like small elephants and humans evolved. So much interesting stuff must be under water. Images at the site below show that the British Isles were connected to Europe, Florida was twice the size, and large islands of Southeast Asia were connected to the mainland.
Of course, the twice-the-size Florida will be easier to examine using robotic subs, it’s just a matter of looking for the the shuffleboard courts.
Indeed. Atlantis comes to mind... :)