This oblong county stretches along the western side of the lake towards the central volcano mountain massif Hengill and Mt. Ingolfsfjall. All islands of the lake are within the county boundaries. The steep and sheltered shoreline of the lake is dotted with privately owned holiday houses in well-vegetated and beautiful surroundings.

The distance from the crossing on the Thingvellir road to the geothermal power station Nesjavellir is about 12 km. The power station, situated in a very active high temperature area, supplies the capital area with about 20% of its hot water used for central heating and other purposes.

A nice hotel near the station constructions offers among other things the possibility of short and extended hikes on well marked paths, both summer and winter, and organized snow scooter tours in winter. The roads from the hotel and the power station fork in the directions towards the hydroelectric power stations on the discharge of Lake Thingvallavatn  and through the beautiful landscapes of the mountain massif towards the capital area.