Perlan

Perlan, originally uploaded by Jarod Carruthers.

Each of the 6 water tanks can hold 4 million litres of geo-thermally heated water.
The water is sitting at about 85 degrees celcius and supplies all of Reykjavic.
It actually takes longer for the water to get cold at the tap.
Some of the water is supplied to heat the ashphalt of car parks in the city!