Widest avenue
Who
Avenida 9 de Julio
Where
Argentina (Buenos Aires)
When
1960
The widest avenue in the world is the Avenida 9 de Julio, Buenos Aires, Argentina. Its incredible span of around 110 m, 16 lanes of traffic plus landscaped medians occupies an entire city block. Construction began in 1935, and was largely completed by the 1960s.