Geograph is an amazing site with thousands of copyright free photos distributed for reuse using the Creative Commons Licence. It even tells you when photos have been taken.
Site Hits: 91 today, 56 yesterday, 2,401 this month, 2,336 last month, 1,264,200 total System Hits: 8,384 today, 148,484 yesterday, 3,153,085 this month, 4,348,457 last month, 1,593,137,639 total