Augmented reality is gaining popularity in the corporate promotion and advertising space, and Layar is a common solution for many companies. One such example which just launched this week is that of Enel, Italy’s largest energy provider, and the second largest in all of Europe.

The company’s vision for 2011 is to inspire “a future built on sustainable well-being” - a dream they say has persisted throughout the years. A TV ad shows a boy in the past tossing a paper airplane into the air and through time as it eventually lands at the feet of a boy in present day.

To help with the campaign, Enel is enhancing their billboard advertisements in airports across Europe with an augmented reality experience built on Layar. The billboards feature a marker which encourages viewers to download Layar and launch the Enel layer for additional information.

You can see the same paper airplane from the ads floating around you, and can click it to watch the video on your phone. Other 3D models include videos and information about electric vehicles and the smart grid.

You can view some of the videos at Enel’s website, and the billboard ads can be found in airports in London, Pairs, Madrid, Barcelona, Frankfurt, Brussels, Bucharest and Moscow.

On your mobile device? Click here to launch the Enel layer now!