25 Unique Natural Wonders That Look Like They Belong on Another Planet

21. Cano Cristales (The River of Five Colors), Colombia

During a brief window from July to November, Colombia's Cano Cristales river transforms into a "Liquid Rainbow," a vibrant explosion of red, yellow, green, blue, and black. This breathtaking spectacle isn't from minerals or algae, but from a unique endemic aquatic plant, Macarenia clavigera, flourishing in specific conditions. Its ephemeral beauty, nestled in the remote Serranía de la Macarena National Natural Park, creates a surreal, living painting that defies the imagination, offering a truly unique and fleeting otherworldly experience on Earth.