According to British newspaper The Guardian, El Ateneo Grand Splendid is the second best bookstore in the world. It preserves the splendour and elegance of the former Gran Splendid theatre/cinema, which was designed by architects Peró and Torres Armengol. Located in the Recoleta neighbourhood, El Grand Spendid theatre opened in 1919 and immediately became a beacon of porteño culture, hosting ballet, opera, and the first "talkies" shown in Buenos Aires. The national Odeon record label - now owned by EMI - was based here, and singers such as Carlos Gardel recorded on the premises. https://turismo.buenosaires.gob.ar/en/atractivo/el-ateneo-grand-splendid

The iconic Obelisco de Buenos Aires stands at the intersection of two of the city’s most important streets: Avenida Corrientes and Avenida 9 de Julio, the widest street in the world with an incredible 16 lanes. The monument was erected in 1936 to commemorate the first foundation of the city by Pedro de Mendoza in 1536, and marks the sport where the Argentine national flag was raised for the first time. Measuring 67.5 metres in height, the obelisk was was designed by Argentine modernist architect Alberto Prebisch, who also designed the Gran Rex Theatre, which can be found nearby at Corrientes 857. https://turismo.buenosaires.gob.ar/en/otros-establecimientos/obelisco-obelisk