Because of a design alteration, this structure's third floor passage leads nowhere and is now a sleeping alcove. A stepped semicircular canopy connects its main house to its guest house. Living room illumination comes from overhead trellis beams, while another set of trellis beams hang over this structure's entrance. The corner windows run directly into the stonework, while broad bands of red-framed windows fold out onto balconies. Deflection of 
Because of a design alteration, this structure's third floor passage leads nowhere and is now a sleeping alcove. A stepped semicircular canopy connects its main house to its guest house. Living room illumination comes from overhead trellis beams, while another set of trellis beams hang over this structure's entrance. The corner windows run directly into the stonework, while broad bands of red-framed windows fold out onto balconies. Deflection of its concrete cantilevers and mold damage has led to its owner dubbing it "Rising Mildew". For 10 points, name this Pennsylvanian house situated over a waterfall, designed by Frank Lloyd Wright.
Because of a design alteration, this structure's third floor passage leads nowhere and is now a sleeping alcove.
{Fallingwater} [or Edgar J. {Kaufmann Residence}]