The visual climax of Golden Circle is Gullfoss, the best waterfall in Iceland and frequently rated among the world’s top ten. From its origin at the Langjökull Glacier, the Hvítá River flows for 25 miles before reaching this arrowhead-shaped fissure. This was carved by a glacier outburst about 10,000 to 13,000 years ago. Then the torrent of brown water cascades three times before seeming to disappear into the earth. This sensational view from near the visitor center is enhanced by dancing rainbows. You can enjoy this dramatic display of nature for free.