Encyclopedia Mythica"...internet encyclopedia of mythology, folklore, and religion"
The mythology section is divided to six geographical regions: Africa, Americas, Asia, Europe, Middle East, and Oceania. Each region has many clearly defined subdivisions that will ease your search. One can 'jump to' areas such as Korean, Haitian, Latvian, Mayan, etc.
The Folklore section contains general folklore, Arthurian legends, and fascinating folktales from many lands.