I *still* haven't received any officials from Argentina, but at least I have some postcards from there thanks to swaps, like this one I received last year.
Avenida 9 de Julio is the widest avenue in the world. It is located in the city of Buenos Aires, Argentina. Its name honors Argentina's Independence Day, July 9, 1816.
The avenue runs roughly 1 kilometre to the west of the Río de la Plata waterfront, from the Retiro district in the north to Constitución station in the south. The avenue has up to seven lanes in each direction and is flanked on either side by parallel streets of two lanes each.