An Enormous, Thrilling New Art Museum Opens Under An Old Bus Station Parking Lot

“Bulging white mounds rear up out of the ground in the middle of Helsinki, tapering to circular windows that point like cyclopean eyes around the square. Children scramble up the steep slopes while a skateboarder attempts to glide down one, past a couple posing for a selfie at the summit.” Oliver Wainwright visits the new Amos Rex museum in the Finnish capital.