The Ivanpah Solar Energy Facility is one of the largest solar thermal energy plants in the world. It is spread out over 14 square kilometres and can power 140,000 homes every year
Source:
https://www.newscientist.com/article/mg24632820-900-mega-solar-plant-uses-170000-mirrors-to-generate-heat-for-electricity/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home