They are massive compared to the ones from Puerto Rico. However they don't actually grow in the cold Bogota Savanna, but on what they call the hot and temperate regions of Colombia (lower than 2000 meters). They are still sold everywhere.
Guanabana is my favorite tropical fruit. I live in Quito, Ecuador and the big ones like this are available in the traditional markets. Vendors with small carts amble through the parks selling Guanabana juice, calling out "Guanabana! Guanabana! Guanabanate!"
¡Yo estuve ahí!
(literal, en este punto desde donde se tomó la foto)
Saludos desde México.
Guanabana!