White polished rocks are scattered everywhere at Djúpalónssandur. Tourists consider them perfect for stacking into cairns. Historically, captains of fishing boats used them to screen a sailor’s strength. The stones were graded from Fullsterkur (weighing 340 pounds) to Amlóði (at 50 pounds). In order to qualify as an oarsman, a recruit had to be able to lift the 119 pound Hálfdrættingur (Half Carrier) onto a platform.