Fernando Jiménez wrote:
It's a tree in a city of Spain. I've never seen his fruit, it's very
strange. Pictures are pretty bad quality, only fruit and leaves, but I
think they're enough.

http://img233.imageshack.us/img233/6766/fruit1cy1.jpg
http://img110.imageshack.us/img110/4112/fruit2kj7.jpg

Thanks in advance.

It looks like a North American "Osage Orange" - Maclura pomifera

_Philip