There are a lot of hearts on display in Retiro, around Plaza San Martín and Palacio Paz. Like the Cow Parade and other similar displays the hearts are for a charity. In this case, appropriately, a heart foundation.
I don’t know how long the hearts will be hanging around, hopefully not that long but it makes a refreshing perspective on the area when it’s like your 300th visit to Plaza San Martín.
And if you like the hearts or even if you don’t, then you might be interested in this related post from my archives: Cheers for Italia from the heart patients…and for a great doctor