This is the Gemasolar Thermosolar Plant in Andalucía, Spain, which is a type of Concentrated Solar Power (CSP) plant. It works by reflecting sunlight off of heliostats (sun-tracking mirrors, basically) onto a tower where salts are heated. These heated salts are then used to create steam, which in turn runs a turbine that generates electricity. It is also capable of producing electricity day and night thanks to a salt storage system that can keep the turbine going for 16 hours. For more, watch this video.
Having never even heard of this type of solar power plant until just the other week, I feel like I just took a leap into a future I didn’t even know existed. My mind = blown. And not only is this a really ingenious way of harnessing solar power, the whole thing just looks incredible too. Yay for environmentally-friendly energy without it looking like a complete and utter eyesore.