The Netherlands Institute in Turkey is publishing the photo archive of a renowned scholar of Ottoman monuments in southeastern Europe. Machiel Kiel's images from the 1960s-1990s - slides, negatives, and photographs - are being digitized and made freely available, with appropriate credit to Kiel.
Weather is always a topic of conversation, and more so when there's a dramatic storm imminent. NASA's multimedia page is a great source for weather images...
ARTstor, the immense digital image library subscribed to by our University Library, is always adding new collections to support research and teaching in the whole range of humanities, arts, and social sciences. The latest addition is that of the Courtauld Gallery: 500 of a projected 8,100 images of the museum's canonical works of western European art!