Experience Rainbow Mountain (Vinicunca), Peru's most Instagram-famous natural wonder, where mineral deposits have painted the mountainside in brilliant stripes of red, yellow, green, and purple that create a surreal landscape unlike anywhere else on Earth. Begin the challenging trek at 4,300 meters elevation, gradually ascending through traditional Andean communities where llamas and alpacas graze against a backdrop of snow-capped peaks, while acclimatizing to the thin air that makes this high-altitude adventure both challenging and rewarding. Reach the viewing point at 5,200 meters to witness the full spectrum of colors created by iron oxide, sulfur, and other minerals that have been exposed by erosion over millions of years, creating geological art that seems almost too beautiful to be real. Learn about the geological processes that created this natural masterpiece and the recent discovery that has made it accessible to visitors, while respecting the sacred nature of the mountains that local indigenous communities have revered for centuries as apu (mountain spirits) that protect and provide for their people. The trek requires good physical condition and proper preparation for high altitude, but rewards adventurous travelers with one of the world's most spectacular natural displays and the satisfaction of reaching one of Peru's most remote and pristine wilderness areas, where condors soar overhead and the silence of the high Andes creates a profound sense of connection to the natural world. Entry is around $8 per person, but travelers should strongly consider joining a tour group or hiring a local guide to stay safe on the trek.