Old Maps Online

Found this website and thought you'd probably all be interested:

http://www.oldmapsonline.org/#bbox=-...00&dateto=2010

The name says it all, really - old maps. Online.
I'm sure the cartophiles amongst you (including me!) will enjoy a hearty browse...

For those who can't work out how to use it, all you do is click on the map on the area you are interested in. Keep clicking to zoom in to give as big, or as small, an area as you would like. Any old maps they have for that area are shown in the right hand column.