Snøhetta has completed Under, the "world's largest underwater restaurant", which plunges from a craggy shoreline in the remote village of Båly, Norway.
Designed by Snøhetta to resemble a sunken periscope, the 495-square-metre restaurant is fronted by a huge panoramic window that gives visitors a "unique view" of marine life.
The building on Norway's southern coast, which can seat up to 40 people and will also be used as a marine research centre, is Europe's first underwater restaurant.

"The idea was to make a tube that would bring people from above sea level down under the sea," Grasdal added.
"That transition is easy to understand, but it's also the most effective way to do it. It also feels secure, but you don't feel trapped."
The concrete has been left with an exposed, rugged texture to encourage algae and molluscs to cling on. Over time this will create an artificial mussel reef that helps purify the water, and in turn naturally attract more marine life.

The restaurant has three levels including a foyer and cloakroom, champagne bar, and main restaurant on the lower floor. They are joined by a giant oak staircase.
The focal point of the restaurant is its panoramic acrylic window, which can be seen from each level within the building. It measures 11 by three metres, spanning the length of the restaurant wall.
A large vertical window also punctures a wall in the champagne bar, extending down to the restaurant to give visitor...