One of Frank Lloyd Wright's finest works, the Robie House is considered among the masterpieces of 20th-century American architecture. The open layout, linear geometry of form, and craftsmanship are typical of Wright's Prairie School design. Completed in 1909 for inventor Frederick Robie, a bicycle and motorcycle manufacturer, the home is also notable for its exquisite leaded- and stained-glass doors and windows. It's also among the last of his Prairie School-style homes: During its construction, Wright abandoned both his family and his Oak Park practice to follow other pursuits, most prominently the realization of his Taliesin home and studio in Spring Green, Wisconsin. Docents from Oak Park's Frank Lloyd Wright Home and Studio Foundation lead tours here, even though the house is undergoing a massive, 10-year restoration (the house will be open throughout the process, but your photos may include plenty of scaffolding). A Wright specialty bookshop is located in the building's former three-car garage -- which was highly unusual for the time in which it was built. Allow 2 hours.