Araucaria bidwillii (bunya pine)

there is a tree next to the estadio centenario

Thank you Craig, Clive, Jprat and Achmmad for the suggestions. Checking the pictures it is not an Araucaria angustiolia because it only seems to have branches at the top and the pine cones are different (I have eaten the seeds - pinhão - in Brazil and they are delicious!; pity they aren´t those...). The Araucaria bidwillii is the correct id and according to wikipedia the pine cones are as the ones we saw: http://en.wikipedia.org/wiki/Araucaria_b...
I don´t know if they are edible, the one that had been cut or was broken, was there like that so we can´t tell, maybe someone broke it to have a look inside and that is why they weren´t cut as the brazilian ones. Craig, the tree is in a central park in the middle of the city next to a children´s playground, hopefully the pine cones do not fall on heads....never heard of any case but maybe it´s something to worry about...

The tree certainly looks like an Araucaria, judging by the fallen branches in the background. Was the tree growing in a wild area or somewhere it might have been planted? Not that a wild area would rule out Araucaria bidwillii entirely, but would make it less likely that an Australian species. The cone does look similar to this alien though.
Pictures of Araucaria angustifolia female cones seem to show a different way of breaking up to the one in your shot and I know Araucaria araucana female cones are similar in habit to the ones in this link too: http://en.wikipedia.org/wiki/File:Pinhas...
There is always the possibility that the cone in your hand is unfertilised though, in which case it would have a different appearance to one bearing seeds.

it could possibly be the bunya bunya tree, araucaria bidwillii

Really big! I'm not sure at all but it must be Araucaria, there are two alternatives of this group, A. araucana or A. angustifolia. http://en.wikipedia.org/wiki/Araucaria_a.... Both of them come from South America.