Futuristic revolving glass-domed fine dining restaurant in park setting, with cocktail bar. The Perlan might look like extraterrestrials have set down and built their base in Reykjavik, but it’s actually just a bunch of hot water tanks, which are used for heating the city, surrounding a glass dome with a restaurant inside. If you have enough cash, the restaurant and bar are superb, but budget travellers, like me, go there for the free panoramic views of the city.