I enjoyed reading this. First of all - would be great to walk on those clouds :) Sometimes I lay on the grass and look up and search for interesting shapes, makes me smile. I agree that we mostly use our "saved pictures" and rarely find true imagination. For me was and is hard to step out of my learned behavior also in art, like Picasso said "It took me four years to paint like Raphael, but a lifetime to paint like a child".
I think that imagination and knowledge are connected - you first imagine something and then create it, to make it physical shape, you need knowledge. We learn all the time for sure. Well I could probably discuss this on and on, so I will just say: thanks for these dreamy photos, hope they'll help you to keep your spirit joyful even in the city :)