The world's tallest bridge opened to traffic on Sunday morning in the southwestern Chinese province of Guizhou. The latest addition to China’s rapidly expanding infrastructure network, the Huajiang Grand Canyon Bridge slashes travel time across the canyon from two hours to just two minutes. Standing 625 meters above the Beipan River in Guizhou's mountainous terrain, the bridge is nearly nine times as tall as San Francisco's Golden Gate Bridge. Almost 3km long, the bridge has made multiple technological breakthroughs in its wind-resistance design and high-altitude bridge construction. One of China's least developed provinces, Guizhou is home to nearly half of the world's 100 tallest bridges.