Introduction to Gullfoss: Gullfoss is the largest fault canyon waterfall in Iceland and the most popular tourist destination among Icelanders and the world. The waterfall is 2,500 meters wide and 70 meters high, with two upper and lower waterfalls. The river rolled down the fault, like an army caught in a big trap. The people were turned upside down, and the current was turbulent and earth-shattering.