Love the Japanese idea of a window flush with the tub! Nothing says relaxation like a nice soak with the breeze :) (There'd need to be a tree or something though for privacy haha) . there is a Japanese Garden (patio) outside.
i love the idea of this glass bath tub and how cool it looks but i am little afraid of how hard it would be to keep it clean and sparkly everyday. Plus I hope no one would walk in on you in the tub, that might be weird.