Avenida 9 de Julio, the Obelisco & Buenos Aires' Grand Boulevard

Avenida 9 de Julio (the main north-south artery of Buenos Aires, claimed to be the widest avenue in the world at its widest point (140 metres, 14 lanes of traffic plus two footpaths and a dividing median), running approximately 3 km through the heart of the city from Constitución in the south to Retiro in the north): at the intersection of Avenida 9 de Julio and Avenida Corrientes stands the Obelisco de Buenos Aires (the 67.5-metre white obelisk built 1936 to commemorate the 400th anniversary of the first founding of the city in 1536 and the site of the first raising of the Argentine flag) — the most recognizable landmark of modern Buenos Aires.