Madonna sang “Don't Cry for Me Argentina” from the Casa Rosada balcony in “Evita” (1996). In Buenos Aires, tango was born on the sidewalks.
Buenos Aires's 9 de Julio Avenue, about 140 metres wide, is one of the widest avenues in the world.
Skip touristy Caminito for the bars of San Telmo. An eSIM is invaluable: track the “blue dollar” rate via an app, order a Cabify, and Google Maps for the pampa.