We've all seen beds with storage space hidden underneath, but never to this extent. 'Container' by Dielle uses "gas pumps" to elevate the mattress and fit, essentially, a whole walk-in closet (albeit, a very short one) in a the empty space. Not only does it save a ton of space, it looks pretty sleek as well.
· Modern, Space-Saving 'Container' Bed Hides A Closet Beneath The Mattress [Design Taxi]