Bathroom in Mr. Kaufmann’s sitting room. August 31, 2014 426 × 641 Falling Water – one of Frank Lloyd Wright’s masterpieces Walls and floor are cork, cabinets are all N. Carolina Black walnut, and note the rainforest shower head in the bathtub! This was built in 1935 when lots of people, even well-to-do people, were still using outhouses!