University of Oxford (UK)
Arts & Humanities Research Council: British Photos of Central Tibet
A wonderful site that includes over 6000 photos taken by British officials and tourists. You can create your own picture album and send it to a friend. Clicking on "Places" will show you a map of where the photographers traveled.
Other
Tibet Photos by Randy Ulland
People, monks, land, children, and objects, are the topics you will encounter in this Tibetan photo site.