Just out of curiosity I notice that both of your images of Fallingwater are in a close to 21:9 aspect ratio, (2.28:1 vs 2.33:1). It’s one of my favorites for pannos (wide but not too wide) but one doesn’t see too many images published in that format. Are you a fan of 21:19 ?
BTW, I very much like your fantasy house. In my case a friend owns an island about 200 km. north of Toronto. One of the features is a large granite dome with glacial groves. The back part of the dome drops about 20 feet with old-growth forest at ground level. The front of the dome slopes gradually at first and then drops rapidly to a bay.
I’ve hiked up there many times and in my mind’s eye I can see a geodesic dome of roughly the same dimensions on top of the existing one with the floor of the geodesic dome extending past the drop-off to make the rear half of the upper floor a kind of tree-house with stairs leading down to the forest level where there would be a jalousied, screened-in porch where you could sit in the forest without being chewed up by no-see-ums and deerflys.
Finally, an elevator to get people and supplies from the boat house up to the dome & I’d be set, although it would probably take a lot more to make it habitable over the Canadian winter, so, at best it would be a real neat Summer cottage.
The only other problem is that it’s in Canada. ‘Nuff said.