Photographs and more photographs of the ancient city of Palmyra, seat of the Palmyrene Empire and home to Queen Zenobia.
Gaia Photos is "Your global team of local photojournalists," with contributions ranging from Nepal to Canada, and Mongolia to Texas. via The Press Photographer's Year 2009.
Northwestern University hosts a fine collection of historic East African photographs, viewable as sample sets or in their original photo-albums (requires flash). But the real prize is their wonderful collection of 113 historic maps of Africa, which are zoomable to incredible detail, also 1, 2, 3. via