Arrr matey - looking for treasure?
Try one of these map sites:

http://www.helmink.com/
http://evo.bio.psu.edu/caribmap/cayman/index.htm
http://www.libs.uga.edu/darchive/hargrett/maps/colamer.html
http://geoimages.berkeley.edu/JefferysAtlas/Jefferys_TOC.html
http://www.davidrumsey.com/
http://www.maphistory.info/imageworld.html#atlas
http://www.maproom.org/

all kinds of antique charts and maps to be found.