The Borgarfjörður circle. Take Road No. 50 to the hot spring Deildartunguhver and Snorrastofa in Reykholt, and then take Road No. 518 to Húsafell, where you will find many attractions, including the waterfalls Hraunfossar and Barnafoss. The caves Víðgelmir and Surtshellir are also close by. Return via Road No. 523 and drive to Varmaland; continue from there on Road No. 1 to the right. Near Bifröst, the waterfalls Glanni and Paradísarlaut and the scoria cone Grábrók can be found.