At Under, a SnΓΈhetta-designed restaurant balanced on the Norwegian coast, guests dine 16 feet below the oceanβs surface. The tilted concrete tube gives the impression that itβs sliding into the sea. βThe idea was to make a tube that would bring people from above sea level down under the sea,β lead architect Rune Grasdal told Dezeen. βThat transition is easy to understand, but itβs also the most effective way to do it. It also feels secure, but you donβt feel trapped.β The angle was also designed with the buildingβs aquatic neighbors in mind. Over time the structure will become part of its environment, acting as an artificial reef. Marine research tools like cameras have been installed outside the restaurant to help scientists learn about the population, behavior, and diversity of the species living in this part of the North Atlantic.