Most people, including myself only know about a few recent sites that have been found regarding ancient cities. But in order to paint a more complete picture of the scope of human trade, culture and networks we need information. I've found a great site for this. Appearantly just news accounts with photos but encapsulated on one site. From Asia to Europe, articles detailing recent finds of cities underwater in oceans, seas and lakes. Also ancient ships and thier cargo.
http://www.morien-institute.org/uwnews2007b.html
Ive noticed a few topics lately concerning ancient civilizations/floods and figured this might help.