I want my novel to have more than just the real common mythical creatures. (Like dragons) Are there any websites or books with mythical creatures in them? I'd prefer they had pictures or at least a detailed description of what the creature would look like. At the moment I'm need more benevolent nature spirits like nymphs or dryads.
Try this... it may help? It has lots of links that provide details on mythical creatures.
I really like this site because it is multicultural: http://mythology.wikia.com/wiki/Main_Page