I worked in a building with huge picture windows looking out onto a beach, for a year. I can confirm subjective productivity and relaxation benefits compared to sitting in a windowless room.
I sometimes take my laptop outside to a coffee shop with outside seatings and wifi. Even though I can't do "heavylifting" that I do at home with three displays, the creative stuff is really easy to generate when windowless and wallless :)
I've set up a "nest" in a lot of different places. What I'd like is a huge window overlooking something worth viewing everyday, like the mountains or the beach. Something light and open with lots of walking around room, not something that looks like the crypto shack on a nuclear submarine.
To each his own, though.