When people wrote letters to Disney to inquire about visiting the Walt Disney Studios, he realized that a functional movie studio had little to offer to visiting fans, and began to foster various ideas about building a site near the Burbank studios for tourists to visit. His ideas evolved to a small play park with a boat ride and other themed areas. The initial park concept, the Mickey Mouse Park, was originally planned for an plot to the south, across Riverside Drive from the studio. Besides Greenfield Village and the Chicago Railroad Fair, Disney was also inspired by Tivoli Gardens in Denmark, Knott's Berry Farm, Colonial Williamsburg, the Century of Progress in Chicago, and the New York's World Fair of 1939.