When I need an image for this blog, or the other websites and blogs I support, or to use a picture instead of a thousand words in a PowerPoint deck, the first place I check is Photos8.com, a source for thousands of high quality photographs. The site is run by Sam Mugraby, an Israeli photographer and graphic artist who offers his fine work for free (with a liberal license) at Photos8.com or in the public domain at republicdomain.com. As you might imagine many of his photographs have an eastern Mediterranean sensibility but a great many could have been taken anywhere. Next time you need a fresh image to make your point give Photos8.com a try.
Updated To Add:
Got a note from Sam in response to this post. He appreciates hearing from people who use his work. He seems like a nice guy.