Gunnuhver Geothermal Area, Southern Peninsula.The largest mud pool in Iceland also is located here - it is 20 m across, boiling vigorously along its rims. Hot ground is an immense source of energy. In 2006 near Gunnuhver geothermal field started to operate the Reykjanes Geothermal Plant. As a result the steaming of the ground in the geothermal field increased. the troublesome ghost of Gudrún Önundardóttir—who gives her nickname ‘Gunna’ to this beautiful geothermal field