Old Maps...

A large collection of old maps is up online, and you can explore it for free.  Within a few minutes I was able to find the map from 1888 at right (click to enlarge), which shows the area around where I grew up, just south of Robbinsville.  Of course there isn't complete coverage of every area, but if you browse through their collection you'll find that a surprising part of the globe is covered.

Kudos to the folks at the David Rumsey Historical Map Collection for a beautiful example of applying modern technology to the challenge of making such a fine collection publicly accessible...