PITTSBURGH (AP) — The iconic Fallingwater home built over a western Pennsylvania waterfall by Frank Lloyd Wright has been designated a World Heritage site by the United Nations Educational, Scientific and Cultural Organization. UNESCO says Fallingwater and seven other Wright buildings were added to the list Sunday at a meeting in Baku, Azerbaijan. The director calls it “a tremendous honor.” Designed in 1935 for a Pittsburgh department store magnate, Fallingwater receives about 180,000 visitors per year.