Tourists walked around the main palace Gyeongbokgung to watch the changing of the royal guards ceremony at the Woldae platform in Seoul. K-pop supergroup BTS is set to hold an outdoor concert at the same site on March 21 for its long-awaited comeback, corresponding with its first new album in nearly four years, “Arirang.” According to organizers, the group is expected to appear with Gyeongbokgung as a backdrop, proceed past the gate Gwanghwamun and the Woldae platform before taking to the stage