What world record is held by the avenue that contains Argentina's Obelisco de Buenos Aires?
Obelisco de Buenos Aires: The Obelisco de Buenos Aires (Obelisk of Buenos Aires) is a national historic monument and icon of Buenos Aires. Obelisco de Buenos Aires:  Located in the Plaza de la República in the intersection of avenues Corrientes and 9 de Julio, it was erected in 1936 to commemorate the fourth centenary of the first foundation of the city. 9 de Julio Avenue: July 9 Avenue, located in the city of Buenos Aires, Argentina, is the widest avenue in the world.
the widest avenue in the world