You can now buy tickets for the world's tallest and longest tunnel slide at London's ArcelorMittal Orbit Tower.
원문출처 : http://www.cnn.com/2016/04/28/design/worlds-tallest-longest-tunnel-slide/index.html
원문출처 : http://www.cnn.com/2016/04/28/design/worlds-tallest-longest-tunnel-slide/index.html