Pan-American Institute of Maritime Archaeology (PIMA)
http://www.wbm.ca/users/nfisher/
This site provides a view of archaeology other than "just digging in the dirt." Here you will find information on the history of ships and seafaring as demonstrated by underwater finds. You can also volunteer to join the non-profit PIMA on its excavation of a 17th-century shipwreck near the Dominican Republic. Now there's adventure!