Frank Lloyd Wright's Ennis House, 1924. Perfectly sited on a hill with sweeping views of the city to the ocean, the light-filled interiors are enhanced by architectural details such as soaring wood-beamed ceilings, a window-lined loggia framing the pool and a flowing multi-tiered floorplan. Wright's signature appointments - prairie style leaded art glass, mitered windows and the best remaining example of one of only four glass mosaic tile fireplaces - further distinguish this historic offering.