Have you ever been to the oldest pharmacy of Buenos Aires?
Funded in 1834, the Farmacia de la Estrella is still running and sell many products in this authentic old decorated building. You will be amazed to discover the paintings above the shelves, the ceiling made in wood and the old clock. Splendid!
Access is free
Once you're in the pharmacy, try to visit also the Museo de la Ciudad (Town Museum). It's full of history and located at the same place!