Perlan or the "pearl" is an impressive building resembling a pearl with its glass dome. The glass dome covering Perlan is built on six huge aluminium tanks able to reserve 24 million litters of water at 85°C. A small forest surrounds Perlan with hiking trails great for short walks in a tranquil environment. You might even spot some wild rabbits living there. Perlan offers a café, a restaurant, a souvenir shop, and a spectacular viewing deck offering panoramic views of Reykjavík City.