Industrial Sliding Doors

Groovy

Wall of Biomass

I'm very fond of this "Wall-o-Biomass" at CDG's Terminal 2E (called the S4).  It is pleasant to look at, has a sound deadening effect (like a nearby road), and very eco in general.  A wall like this could also hide an unsightly view.  That said, it very well may be high maintenance.

Sliding External Window Blinds

We like how the blinds slide along the rails.  (Never mind the very mechanical and soulless texture of the aluminum.)  Done correctly they could also serve as security bars.  Care will need to be take so that the blind actually blocks the sun.