Natural History Website Rocks!
In preparation for my upcoming trip to the UK, I've been surfing the Natural History Museum of London's website. I just love the animal graphics they use on the right side of the nav-bar! Very nicely done! It's cute, it's relevant, and it doesn't get in the way. Great use of graphics to give a "feel" to a site.
As an example, check out the Biodiversity research at the Museum - Natural History Museum.