Gljúfrabúi (which has occasionally been called Glúfrafoss) is a waterfall just a short distance away from the popular Seljalandsfoss, and for all of its neighbor's dramatic showiness, these falls, by contrast, put on a more subtle display.
Translating to "the one that lives within the canyon," Gljúfrabúi runs from the river Glúfurá and falls 40 meters (about 131 feet) into an enclosed grotto. While the top of the falls are visible from a distance, many visitors venture into the misty enclosure to stand atop a rock at the base of the falls.
Those wanting to walk to the base should be aware that heading into the canyon requires walking up the creek, and the mist from the falls is thick, so plan your footwear and dress accordingly. Outside of the falls are a couple benches and interpretive signs.
A wide flat path leads to Seljalandsfoss about 150 meters away, and it's easy to view both on the same trip with the short walk.
Visitors may also consider parking at the large parking area at Seljalandsfoss. There are no amenities at Gljúfrabúi.