スウェーデンのストックホルムの地下鉄がアートだらけになっていて素敵！
Marvel at Stockholm's Subway Art
'The most beautiful metro in the world' – BBC News
Stockholm Metro art – Sweden – VisitSweden: The official guide to travel and tourism in Sweden
http://www.visitsweden.com/sweden/Regions–Cities/Stockholm/Culture-in-Stockholm/Stockholm-Metro-art/
Art in the subway – Visit Stockholm – The official guide
http://www.visitstockholm.com/en/See–do/Attractions/art-in-the-subway/
