Lotte World Tower Int'l Skyrun held in Seoul

Runners pose for photos prior to the Lotte World Tower International Skyrun 2018 in Seoul, South Korea, on May 13 2018. Runners raced up the 123-floor, 2,917-step, 555-meter-high skyscraper, South Korea's tallest of the kind, on Sunday. (Xinhua/Wang Jingqiang)