RoadsideAmerica.com: Cardiff Giant Battles
Information about the two giants -- the original and a copy -- currently on display in Cooperstown, New York, and Farmington Hills, Michigan, respectively.
P.T. Barnum - King of the Weird
The story of George Hull's original Cardiff Giant and P.T. Barnum's competing copy of it.
Hoaxipedia: Cardiff Giant
Overview of the famous "giant" from the Museum of Hoaxes.