Stadarborg is a sheep shelter, 2-3 km from the former parsonage Kalfatjorn in a direct line from there to Mt Dyngja.  It is round in shape and constructed skilfully from lava rocks.  It is about two metres high, 8 m in diameter, and 35 m in circumferance.  The ground inside it is flat and covered with grass.

No sources reveal its age, but it must be a few centuries old.  According to the legend, a man named Gudmundur built it for the reverend at Kalfatjorn.  He worked elaborately at the construction, collected stones from the surrounding area to have a large selection to choose from to fit them together as perfectly as possible.  He planned to close it with a cone shaped roof of stones, but the reverend envisioned it higher and more prominent than his church’s steeple and stopped the construction work.  The stone mason left it exactly as we see it today.  It was declared inviolate in 1951.