Perlan ('The Pearl') is a museum and rotating glass dome that stands on top of Öskjuhlíð Hill in Reykjavík.
Originally, it was a place to store the city's hot water.
Today, you can visit here real - life ice tunnel, you can find a planetarium and nature exibition.
At the top of the six water tanks, lies an observation deck. From the viewing deck, you are able to see the ocean, mountains and even natural phenomenon found in Reykjavík’s surrounding area; glaciers, volcanoes and active geothermal areas.