🇧🇴Bolivia and the mirror lake Salar de Uyuni – the world's largest salt marsh, lying in the Andes with an area of about 11,000 square kilometers . To see a mirror image, you need to go to the season when it is winter there, and in the Northern Hemisphere - summer. Then the sky will be reflected.
https://goo.gl/maps/gU3CjiiJVJZdoT2WA