I was browsing on the Library of Congress site and found the World Digital Library. It is a cooperative project of LOC, UNESCO and other institutions around the world. It puts rare and unique documents on one database for students, teachers and scholars. It has maps, recordings, books, films, journals and photographs and other interesting things.
Here is the link: http://www.loc.gov/wdl/
It has around 1200 items and it is really fun to see how this website is put together. You can browse by place, time, topic, institution or type of item. Just click on the continent and slide the bar at the bottom for the time period and it shows what there is to look at.
I am just geeky enough to think this is fun!