Down on Norway’s southernmost tip is a restaurant like no other in Europe. Partially submerged beneath the North Sea off the coast of Lindesnes, ‘Under’ will soon become the continent’s first subaquatic dining space. From a distance it looks as though a concrete monolith has toppled from the shore into the ocean. But by the time Under opens in April next year, tourists and intrepid epicures alike will be able to dine while observing the marine environment from its giant panoramic window onto the seabed. The design team behind Under, Snøhetta, call it a ‘sunken periscope’...