Their houses were inspired by their trip through Chicago on their way to California, where they saw the Japanese pavilion at the World's Fair, and also some of the early Prarie Style work of Frank Lloyd Wright.
What I most appreciate about this and the other houses is their amazingly beautiful attention to craft in the detailing. The edges of the supporting beams and rafters are all rounded, and the joinery is all very intentional.
The craftsmanship also carries over into related areas like the woodworking and stained glass in the main entry doors. Where the glass in Wright's Oak Park houses is very geometric, the patterns here are much more natural and organic.
Seeing the Gamble House, first from the bus window, and later as I walked back into town, I was inspired to walk back over the next day to see all of the Greene and Greene houses in the neighborhood. They are really beautiful and wonderfully preserved examples of the best architecture of the period, and i was fortunate to have a beautiful day to visit them. Unfortunately, I wasn't able to tour the interior of the Gamble House, as it was closed the days I was there, but that house is open to the public, and well worth seeing. All of the others I saw are still private homes, but you can walk around the fronts and see the amazing details firsthand.
There is a large group of homes located on Arroyo Terrace, right off Orange Grove, just before arriving at the Gamble House.
My favorite of the houses I saw is called the Duncan Irwin house, and it's located at one of the corners of Arroyo Terrace, with great views out into the surrounding valleys. The colors, forms, and details are similar to those of the other homes, but the corner site enabled them to do an incredible composition, and the entry way, with large natural stone posts and climbing vines, is really nice.