While in PA, we visited two Frank Lloyd Wright homes. The first was Fallingwater. I didn't go inside, instead spending the time roaming the grounds.
One of the neat things about the design is that it's hard to see. You can never really look at the whole house at once. Each angle looks completely different, and it's not really clear where the boundaries are between the house & nature.
In this picture you can see how the balconies & rock formations have similar shapes. That's my gnome in the foreground.