On Sun, 03 Sep 2006 17:00:58 +0200, 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.

I think it is Osage Orange (Maclura pomifera). See
http://en.wikipedia.org/wiki/Osage-orange
or Google on common or scientific name.