Incredibly ancient. Ahough there are some nice enclosures in that park. The park itself also looks very clean.
But this lion cage isn't the same as this one, right?: http://www.zoochat.com/1108/lion-cage-180372/
No, they are different cages. There were at least two different lion cages in this area, but pretty much all the zoo's big cats have been moved to the new 'felinario' complex which opened to the public just two weeks ago.
[ame=http://www.youtube.com/watch?v=RnS6yUSbFjQ&feature=related]YouTube - Nuevo felinario en el Parque de las Leyendas 1/4[/ame]
[ame=http://www.youtube.com/watch?v=A5F4sU82aCg&feature=related]YouTube - Nuevo felinario en el Parque de las Leyendas 2/4[/ame]
There are also many other videos available.
It seems to be an improvement, but I'm a bit worried about the amount of pacing, especially by the black jaguar in the second video who had already worn down the grass! It's especially disconcerting as I didn't see any big cats pacing so aggressively during my visit (apart from one of the tigers), but I hope it's just temporary until they settle into their new homes.