Fallingwater or Kaufmann Residence is a house designed by architect Frank Lloyd Wright in 1935 in rural southwestern Pennsylvania, 43 miles (69 km) southeast of Pittsburgh.^[4] The home was built partly over a waterfall on Bear Run in the Mill Run section of Stewart Township,Fayette County, Pennsylvania, in the Laurel Highlands of the Allegheny Mountains.

Time cited it after its completion as Wright's "most beautiful job";^[5] it is listed amongSmithsonian's Life List of 28 places "to visit before you die."^[6] It was designated a National Historic Landmark in 1966.^[3] In 1991, members of the American Institute of Architects named the house the "best all-time work of American architecture" and in 2007, it was ranked twenty-ninth on the list of America's Favorite Architecture according to the AIA.