Down on the waterfront of Buenos Aires is the Reserva Ecologica. It kind of reminds me of the Garden by the Bay in Singapore but not quite as manufactured.
It has some nice walking paths and lots of wildlife!
Walking through the area there makes you forget you are in a big city. The only noise is a variety of bird songs and some bug noises. It is a nice retreat.
There is a wide walking path along the whole waterfront area with various food trucks set up and lots of tables and chairs for hanging out.
In the heart of the city is the Calle Florida, a long pedestrian street that goes from the Casa Rosada/Plaza del Mayo area to Plaza San Martin in the heart of the city. Nearby is the Galerias Pacifico, a shopping center with some beautiful art in it.
In the center median between the various lanes of the major thoroughfare through town, there are a number of art pieces. I’ve already mentioned the obelisk. Here is another piece.