Björg, the northernmost farm in Kaldakinn, with rights to meadows and perquisites. Road 851 ends there, but there is a passable road extending another 5 km to the sea, to a point about an hour’s walk from Naustavík. To walk north around Litlufjörubjarg and Hellisflös to Hellis­vík it was necessary to wait for low tide and a calm sea. There, running south into the sheer cliff is a long cave known as Ágúls­hellir or Þing­hellir; according to a folktale it was the home of a giant named Ágúll, and in the 17th century a magician, Arnór Ólafsson of Sandur in Aðaldalur, is supposed to have had friendly dealings with him. It was not known exactly how long the cave was, as it was generally half full of gravel, but it was believed that a tunnel deep inside it led into another far bigger cave where Ágúll kept his hoard of gold. Various changes have taken place on the western shore of the Skjálfandaflói bay since 1970. Where it used to be possible to walk on the beach, the sea began eroding the cliffs and many old structural remains on the shore have been washed into the sea. The popular explanation is that there is a connection between this and the volcanic activity in the Þingeyjarsýslur counties during the same years. In 1973 the sea washed all the loose material out of the cave, revealing its floor at a depth of 50 m, but no tunnel to the hoard of gold came to light, and, worse still, the walking route north to Víkur is now completely impassable. A 10 m long tunnel was made leading out of the cave; this solved the problem to begin with, but after a few years the sea advanced so far into the shore from the west that the path is completely impassable. It is to be hoped that this impressive route will be opened up once again, but those intending to travel this way should seek guidance at Björg.