After seeing Lake Geneva I visited the Frank Lloyd Wright home and studio in the Oak Park, IL. It was his home for twenty years (22 years old to 42 years old I believe), before moving back to Wisconsin and building Taliesin East in Spring Green (there is also Taliesin West in Arizona, which he moved to after Spring Green).
"The Frank Lloyd Wright Home and Studio (1889/1898) served as Wright's private residence and workplace from 1889 to 1909—the first 20 years of his career. Wright used his home as an architectural laboratory, experimenting with design concepts that contain the seeds of his architectural philosophy. Here he raised six children with his first wife, Catherine Tobin.
In 1898 Wright added a studio, described by a fellow-architect as a workplace with "inspiration everywhere." In the Studio, Wright and his associates developed a new American architecture, the Prairie style, and designed 125 structures, including such famous buildings as the Robie House, the Larkin Building and Unity Temple. We invite you to visit and experience the restored site as it appeared in 1909, the last year that Wright lived in the Home and worked in the Studio."