Here are three new additions to The Best Sites For Learning About Historic Maps:
Historical Maps from Around the World is from Google Earth.
6 of the World’s Oldest Maps is from Discover.
Story Maps from the Library of Congress don’t exactly fit in with the other links on the “Best” list, but it’s close enough. Here’s how they describe it:
Story Maps at the Library of Congress are immersive web applications that tell the incredible stories of the Library’s collections through narrative, multimedia, and interactive maps.