The geothermal area Krýsuvík is situated on the Reykjanes peninsula in Iceland. It is in the south of Reykjanes in the middle of the fissurezone on the Mid-Atlantic Ridge which traverses Iceland
Krýsuvík consists of several geothermal fields, such as Seltún. Here solfataras, fumaroles, mud pots and hot springs have formed, the soil is coloured. Sulphuric water and gases have created colorful deposits, the soil is colored in green, yellow and red colors. Visitors can wonder at hissing solfataras, fumaroles and boiling mud pots, where the soil is mixed with acid.
. Sulphur deposits were mined in 1722 – 1728 and in the 19th century.