9. Fallingwater
Fallingwater is perhaps the most iconic work of the renowned architect Frank Lloyd Wright in rural Pennsylvania. It is an excellent example of his devotion to healthy, clean horizontal and vertical lines and his idea of organic architecture, best demonstrated by the home's outgrowth over a natural waterfall.
When he was already 67 years of age, Wright designed the home in 1935. As an architectural achievement, it was soon recognized, being declared a National Historic Landmark in 1966. The home's construction cost an estimated $2.8 million, adjusted for inflation; at the turn of the century, almost $12 million was spent on its renovation.
