the Salt mines of Maras, Peru
I heard about these salt mines before I headed to Peru last month, and decided it would be best to catch them at sunset, given the reflective qualities of the salt pools. I went with a guy I met in Germany who was en Cusco, I hired a driver from the hostel #kokopelli (which i highly recommend) in order to avoid the tourist crowd. We stayed till after the sun had completely gone away and at the end had a brief encounter with a small boy who was collecting salt for his family. We ended up giving him a lift out of the canyon and some candy for good vibes. Great experience, much worth going to if you get the chance.