The Ögmundarhraun Lava Field formed in an eruption in the year 1151. In that year a 25 km long fissure opened up across the Reykjanes peninsula. The lava field is located in the south and the craters in the northern part. Ögmundur, which the…

  Valahnúkur is composed of tuff layers, pillow lava and breccia. The mountain was formed in a single eruption and shows evidence of the different phases of the eruption. The tuff forms in explosive eruption, while the pillow lava forms when…

Arnarsetur is a short monogenetic volcanic fissure with scoria and spatter craters, formed in an eruption that was an integral part of the “Reykjanes Fires”, a volcanic and tectonic episode from 1210 to 1240. The fissure is two…

  Brennisteinsfjöll, or Sulphur Mountains, are a ridge of late Ice Age mountains. The highest point is the lava shield Kistufell. Brennisteinsfjöll are lined with volcanic fissures that are not much older than Iceland’s settlement. A…

  Brimketill is a small pool carved naturally by marine erosion. It lies at the lava shore west of the town of Grindavík and is one of the most popular natural attractions of Reykjanes. According to folklore it was regularly occupied by a…

  Cove Sandvík, south of the Hafnarberg Cliffs, is a popular recreational area.

Brennisteinsfjöll Volcano is a minor ridge with crater rows and small shield volcanoes in the Reykjanes peninsula, about 20 km or 10 miles south Reykjavík.

The Reykjanes volcanic system has been moderately active with the last eruption occurring in 1240 BC. It is about 45 km long and 5-15 km wide, with a SW-NE trend. Its northern part merges with the Svartsengi volcanic system while the southernmost 9…