Italy's landscape is littered with viaducts, some of which have already fallen to disuse. Considering that some of these old bridges provide breathtaking coastal views, the Italian government is hesitant about spending 40 million euros to tear them down. So they decided to hold a contest, called Solar Park South. The goal? Find a way of reusing the viaducts.
The picture above is from one of the most notable entries, from Jaramillo-Azuero Architects. While the entry from the Colombian firm didn't bag first place, it's notable for its simple proposal: build eco-parks under the decommissioned arches, and at the same time, create wave-powered trains that will run on the viaducts themselves. It's a two-punch eco-combo that netted JAA third place honors.