The new La Florida plant in the northern state of Navarra is the world's largest solar plant, and brings Spain's total solar output to 432 megawatts. (Compare that to the United States' 422.) La Florida is a solar thermal plant (which we wrote about awhile back) that uses parabolic troughs to heat liquid in tubes, which in turn spins turbines and produces electricity.
If the United States has any hopes of taking back the top spot, we're going to have to act fast. Authorities in Spain say that they'll add another 600MW of solar energy within a year, and have a goal of 2,500MW by 2013. Spain's subsidies for solar and wind development are also amongst the tops globally. So it's no great mystery why they're leading the clean energy charge.
Photo (cc) by Flickr user Worklife Siemens