Þorbjörn (also known as Þorbjarnarfell) is a 243-meter-high volcanic mountain located near Grindavík in the western part of the Reykjanes Peninsula. From the summit, you can enjoy a clear view of the expansive Icelandic coastline, the town of Grindavík, and the famous geothermal spa, the Blue Lagoon (and the very new lava field).