Fallingwater is a house designed by architect Frank Lloyd Wright in 1935 in rural southwestern Pennsylvania, 43 miles (69 km) southeast of Pittsburgh.The house was built partly over a waterfall on Bear Run in the Mill Run section of Stewart Township, Fayette County, Pennsylvania, located in the Laurel Highlands of the Allegheny Mountains. The house was designed as a weekend home for the family of Liliane Kaufmann and her husband, Edgar J. Kaufmann Sr., owner of Kaufmann's Department Store.
After its completion, Time called Fallingwater Wright's "most beautiful job, and it is listed among Smithsonian's "Life List of 28 places to visit before you die." The house was designated a National Historic Landmark in 1966. In 1991, members of the American Institute of Architects named Fallingwater the "best all-time work of American architecture" and in 2007, it was ranked 29th on the list of America's Favorite Architecture according to the AIA. It and several other properties by Wright were inscribed on the World Heritage List under the title "The 20th-Century Architecture of Frank Lloyd Wright" in July 2019.