Bartleby
Bartleby.com: Bulfinch's Mythology: The Age of Fable
Bulfinch's collection of Greek and Roman myths is available here in full text format. A little known feature of this work is its sections on Eastern mythology, Northern mythology and a section on Druid religion.
National Institutes of Health
National Library of Medicine: Harry Potter's World: Monsters
A clever account of the history of medicine told as it relates to J.K. Rowling's Harry Potter. Read about the history of monsters, and what led to the development of modern zoology.