Perlan is a distinctive dome-shaped landmark located on Öskjuhlíð Hill in Reykjavik, Iceland. Originally built as hot water storage tanks, it now houses an interactive museum with exhibits on Icelandic nature, including a glacier ice cave and a planetarium. Visitors can enjoy panoramic views of Reykjavik and its surroundings from the observation deck, making it a popular spot for both learning and sightseeing.