Mt Thorbjorn (Thorbjarnarfell) is a free standing, hyaloclastite mountain north of Grindavik.  It offers great panoramic view over most of the Reykjanes Peninsula on fine days.  The northeastern part of the mountain depicts thermal activity and to its north and northeast is an extensive high temperature area.  It is split by a fissure called “The Thieves’ Gap” (Thjofagja), occupied by 15 thieves according to the legend.  They were eventually overwhelmed and killed by trickery.  C. Andrews, the commander in chief of the American forces in the North Atlantic Area during World War II, with several other high ranking officers, was killed there in a crash.  They were arriving from the USA and preparing for landing on Keflavik Airport.  Only one man survived the crash.  He had to wait more than 24 hours for rescue.