Workers put the finishing touches to the Marble Arch Mound, a new temporary attraction, next to Marble Arch in central London on July 25, 2021. - Designed by Dutch architecture company MVRDV, the 25-metre-high landscaped Marble Arch Mound consists of a stairway leading through trees and greenery to a viewing platform at the top. The ticketed new attraction opens to the public on July 26. (Photo by JUSTIN TALLIS / AFP)