There are many sites that display great photographs. Usually the best ones involve photo competitions. I recently came across the Red Bull Illume Image Quest photo competition and was really inspired by many of the photos in the world of action and adventure sports.
Check out the Top 50 Finalists 2013 and even better is an article by The Atlantic with the winners which includes some great explanations next to each photo. A picture is worth a thousand words and it is even more interesting when they provide you with the actual story. Check out the photos and be inspired!