Gullfoss (The Golden waterfall) is Iceland’s most famous waterfall, and one of the natural wonders of the world. It is in the mighty glacial river Hvítá (White river), just a few kilometers from another natural wonder, the world-famous Geysir. The enormous white glacial cascade drops 32 meters into a narrow canyon, which is 70 meters deep, and 2,5 kilometers long. It is a spectacular two-tiered cataract which hangs in the air like fine drizzle and forms a rainbow in the sunlight. In winter it has an unusual appearance when it becomes petrified in ice.