I saw this quite a while back in dwell magazine (as I’m sure some of you did too) and it remains one of the more ingenious solutions for a sleeping area in small spaces.
“Having decided to site the new loft bedroom directly above the kitchen, the architects met the challenge of stacking two rooms, each with a seven-foot ceiling height, in only 12 feet of vertical space by creating two interlocking puzzle pieces: The mattress in the bedroom sits directly atop the ultra-thin kitchen ceiling (which enables a full-height space downstairs), and the floor area around the mattress is two feet lower than the platform on which it sits (thereby creating a full-height circulation area up above).”
[via dwell.com]