Our planet is home to countless wonders, but some places are so extraordinary that they challenge our perception of reality itself. These destinations seem more like backdrops from science fiction movies or fantasy novels than actual locations you can visit. From mirror-like salt flats that stretch to infinity to caves that glow with their own ethereal light, these ten places will make you question whether you're still on Earth or have somehow been transported to another world entirely. 1. Salar de Uyuni, Bolivia - The World's Largest Mirror Salar de Uyuni is the world's largest salt flat, spanning 10,582 square kilometers (4,086 square miles) at an elevation of 3,656 meters (11,995 feet) above sea level. This otherworldly landscape was formed from prehistoric lakes that evaporated over thousands of years, leaving behind a perfectly flat expanse of crystalline salt. During the dry season, the salt flat appears as an endless white desert that extends beyond the horizon, cr...