University of Engineering and Technology (UTEC) - Potable Water Generator

I was completely blown away when I first saw this billboard and had posted it to share with many of my FB friends back in 2013. But I am surprised that I forgot to share about it here!

The intangible benefits of having billboards around range from enlivening an urban environment to publicizing useful messages and also being a public good of lighting up an area.

But this billboard in Peru Mayo takes the cake by being "The first billboard that produces potable water from the air. Mayo DraftFCB for The University of Engineering and Technology"