The Dime Museum In early 19th-century America, dime museums were popular attractions. So named because admission cost $.10, these "museums" were eccentric collections of the bizarre: stuffed two-headed calves, petrified mummies, and dragon fossils. Some of it might have been real. Now two showmen in the old time tradition have opened the American Dime Museum in Baltimore. Harriet Baskas paid them a visit.