In reply to Richard Smith:
Certainly are some great images there.
The National Geographic site is full of them, and has great articles about photography for both travel & nature.
http://photography.nationalgeographic.com/photography/?source=NavPhoHome
If you enjoyed the images on the Yahoo news site it's definitely worth looking at the NG site. The images are NG logo free and if you really like an image you can often download a large sized 'desktop' image for free.
http://ngm.nationalgeographic.com/your-shot/weekly-wrapper
If you are on Facebook it is worth following the NG - They highlight a couple of interesting essays and photographs each day.
http://www.facebook.com/#!/natgeo
