In the year 1151 AD 25 km long fissure opened obliquely across the Reykjanes peninsula. The lava field is located in south of ridge Nupshlidarhals(Vesturhals) and craters in the northern part are part of crater row in the north of Ridge Nupshlidarhals. Ogmundur is a male name in Iceland.

Located West of Lake Kleifarvatn. Drive road 427 and turn left on road 42 then park at Seltún and walk Preststígur. Walk estimated 2-3 hours up and down.