Being an architect, this is as close as you get to an architecture amusement park, well other than Rotterdam or Amsterdam but that is another mess of a story...
Like him or hate him he was an influential figure in the modernist architecture movement in America. You can see the Japanese influences that he took, as well as the principals he took in his architecture in this little resort. It is worth a trip for any serious or budding architect.
One thing I do not like about the tours, they way they present them they act as though Frank might be lurking in the next room, like they have all met him and are looking to meeting up with him after they knock-off for the day. Guys, he is dead, please refer to him in the past.
It would be nice to walk around the grounds unsupervised, rather than the cattle tour, but I can see why they do not let people have free reign on the place.
There is still a working school and practice (I think the practice is still operating) here.