Fardagafoss is a waterfall located just outside of Egilsstaðir on the route towards Seyðisfjörður town. It winds its way up the mountainside of Fjarðarheiði heath. The ascent from the parking area (located only 6 km from Egilsstaðir) to the waterfall takes about half an hour and on the way you will see another waterfall in a beautiful gorge and great views over the surrounding area. There used to be a cave behind the waterfall and legend said that if you entered the cave and made a wish it would come true. Now that the cave has collapsed it is well worth the try to just make a wish by the waterfall.
http://www.visitegilsstadir.is/en/things-to-see/fardagafoss