Buenos Aires's Avenida 9 de Julio, spanning roughly 140 meters and up to 16-plus lanes across its full width including service roads, is recognized by Guinness World Records as the widest avenue in the world. Completed in stages over several decades, it cuts through the Argentine capital and is crossed by the city's Obelisco monument.
Record no. MRB-2026-005736
Widest Avenue in the World
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.