Perlan (; English: The Pearl) is a natural history museum in ReykjavÃÂk, Iceland. It is situated on the top of ÃÂskjuhlÃÂð hill. It was initially only a cluster of hot water tanks, but on June 21, 1991, the building was opened to the public. The building consists of a glass dome resting on top of six district heating tanks. Four of them are still in use, one hosts an ice cave, and one has been turned into a planetarium.
Perlan houses a planetarium with a Northern Lights show called ÃÂróra, an ice cave, which is 100 meters long and is built from around 400 tons of ice, snow, and ash, an interactive glacier exhibit, Lava Show, a water exhibition, Latrabjarg Cliff, a ten-meter-high replica of one of EuropeâÂÂs biggest seabird cliffs, a virtual fish tank, Forces of Nature Exhibit, Iceland's geological story timeline, a 360ð observation deck, an ice cream parlour, a Restaurant and Café and a gift shop.
In 1939, a single hot water tank was constructed on ÃÂskjuhlÃÂð hill in ReykjavÃÂk, where Perlan stands today. It is 61 meters above sea level, which gives enough pressure to push water up to the 10th floor of a building, 38 meters above sea level. That sufficed to supply water anywhere in ReykjavÃÂk â even to the hill where HallgrÃÂmskirkja church stands today. In the next two decades, five more tanks rose beside the first one. They were torn down and rebuilt in the late eighties.
In 1991, those six hot water tanks became the base of Perlan, a building open to the public. This project was largely at the behest of DavÃÂð Oddsson during his time as mayor of ReykjavÃÂk. Shaped and named after a pearl, it now characterizes Iceland's capital. Each tank can keep up to five million liters of hot water, with a volume of 5000 m<sup>3</sup>.
The structural engineer Jón Búi Guðlaugsson designed the Pearl.
Being situated on the top of a hill, Perlan offers a view over ReykjavÃÂk, the surrounding areas, mountains, the Atlantic Ocean.