Scietific American's website hosts a few pages of microscopic images done by a guy named Dennis Kunkel.
I love these images and some bring interesting questions to my mind. Who has ever sat down and wondered about what makes blood clot and how the process works. Maybe some have, but I never had until I visited this site..... enjoy!
SciAm
Maybe I can find more sites along this theme. I once had a bookmarked site with electron microscopic images.