The Guardian
Taking a deep dive in Helsinki’s subterranean city
Under the Finnish capital lies a world of swimming pools, go-karting tracks, playgrounds – and even an art gallery The moon is an impostor. Swimming backstroke beneath its surface, I look up at craggy hollows in close relief. White rock undulates in all directions, a forest of peaks rising next to a desert of craters. Every time I trick myself into thinking I’m somewhere celestial, the sound of…
underground swimming hall excavated from granite bedrock