Interactive Maps online

I am currently taking on on-line course; Michigan History for the 3rd Grade Teacher. One of activities has us critiquing 17th century French maps of the Great Lakes and more. Go here. You can zoom in and out and shift all over the maps.
I did check out the Luna Commons site to see what else there was I found:

Japanese Historical maps

Maps of Africa

David Rumsey Historical Maps ( I have used the ones that are included in Google Earth)

New York State Aerial Photographs