This web page by Giorgio Carboni explains how to easily and inexpensively project the view outside your window onto your wall by turning your room into a camera obscura.  All you need is some duct tape, posterboard, and a lens.

…it’s best if the window faces a view with some activity, it can be entertaining to see cars moving and people jogging upside down across your wall.

Link

From the Upcoming ueue, submitted by Rob H..

In Mr. Chang’s solution, a kind of human-size briefcase, everything can be folded away so that the space feels expansive, like a yoga studio.

The wall units, which are suspended from steel tracks bolted into the ceiling, seem to float an inch above the reflective black granite floor. As they are shifted around, the apartment becomes all manner of spaces — kitchen, library, laundry room, dressing room, a lounge with a hammock, an enclosed dining area and a wet bar.

Link - via unclutterer

From the Upcoming Queue, submitted by Lee.

Antoinette J. Citizen created this art installation straight out of Super Mario Bros, complete with working question mark boxes with sound effects: Link – via Chunnel