Avenida 9 de Julio
At 110 metres wide, this is the widest avenue on earth — and standing at one kerb, the far side genuinely looks far away.
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Named for Independence Day 1816, it runs 3 km from Retiro in the north to Constitución station in the south. Up to seven traffic lanes each direction, two wide medians, and flanking two-lane service roads make the scale hard to believe until you try to cross it on foot.
What to look for
- The Obelisk of Buenos Aires at Republic Square, where the avenue meets Corrientes Avenue
- Up to seven lanes of moving traffic in each direction, plus parallel service roads on both flanks — count them as you cross
- The Metrobus corridor running down the centre of the avenue, inaugurated July 2013
The central Metrobus corridor runs the full 3 km length — board it to travel end to end without fighting traffic.
Avenida 9 de Julio is one of 34 sights worth the detour in Buenos Aires, all bundled offline in Voyage GO — download the Buenos Aires pack and it sits on your map with no signal, filling your travel passport the moment you walk past.
More to see in Buenos Aires
- Mas Monumental Stadium85,018 seats on reclaimed Río de la Plata marshland — the largest stadium in South America, and the ground where a World Cup Final was played.
- La BomboneraThat chocolate-box shape doesn't just look strange — the unusual design gives the bowl its famously excellent acoustics.
- Casa RosadaThe baby-pink paint was a political recipe: mix the Federalists' red with the Unitarians' white, and maybe stop a civil war.
- Teatro ColónAcoustics expert Leo Beranek surveyed leading international opera and orchestra directors and ranked this hall the world's best room for opera — not a slogan, a measured result.
- Oscar and Juan Gálvez Race TrackF1 cars once screamed through the third corner here at 305 km/h, flat out for 40 straight seconds — and the grandstands put you right on top of it.
- Palacio BaroloA 1923 tower mapped floor by floor onto Dante's Divine Comedy — hell at the base, purgatory in the middle, heaven at the top.