This is Colombia's stunning rainbow river, Cano Crystals. The stunning footage captured by TravelDrone4K, shows the colourful river which is filled with macarenia clavigera plant. This plant changes colour depending on the light and water conditions. The plants within the river have been seen in green, orange, red, yellow, and even blue. Cano Cristales was previously in guerrilla territory during the early 2000s, making it an area too dangerous for tourist. Nowadays it is much safer to visit the stunning landscape.