French tightrope walker Nathan Paulin (TOP R) crosses the Millau Viaduct during a traffic-free day to mark the 20th anniversary of its construction, in Millau, southwestern France, on September 22, 2024. Completed in 2004, the Millau Viaduct is the tallest bridge in the world: the largest of its seven pillars rises to 343 metres (1,130 feet) above ground level. Designed by British Architect Norman Forster, this stunning feat of engineering stretches for 2.46 kilometres (1.6 miles) above the valley of the river Tarn, near Millau, in Southern France. (Photo by Matthieu RONDEL / AFP)