California Coastal Records Project:
Our goal is to create a aerial photographic survey of the California Coast and update it on a periodic basis. . . . We currently have over 12,100 photographs (totaling over 82GB) of the California Coast online, covering from the Oregon Border (42N latitude) to the Mexican Border (32.5N latitude), except for the Vandenberg AFB restricted area.
I suppose you could stitch them together to make a very narrow wall poster. (Link from Bruce Sterling by way of David Mankins.)