The greatest thing to do in the ruins of Quilmes is to climb up the hill on which the fortress is built. You can reach the highest place where the indian watch over the area for their security and also have a very nice view going very far to the other side of the Calchaqui valley!!!
Quilmes is one of the 22 partidos that belong to the Great Buenos Aires, there you find the Quilmes Beer Factory and one of the top High school in Buenos Aires. There is not to much to do there, some good restaurants and bars in the Costanera South.
Quilmes is in the Rio de La Plata Coast and there is a beautiful but abandoned Pier over the river where you can see the sundown as in the photos meanwhile you have a beautiful capuccino.