There is a quarry in BCN, where the Olympic Basketball courts used to be, that had stacks of routes set in bolt ons.
The courts were the big white building, which is now Climbat Climbing centre (I went to watch they're first major comp there before they opened). The Quarry is accessed by a tunnel, which had some excellent boulders and routes set inside and was a favourite wet weather hang out, when bored of the wall/skint.
Mind you, there were several road and foot bridges, around the city, with routes set on their structures.
All posts either sarcastic, tongue-in-cheek or mildly mocking-in-a-friendly-way unless otherwise stated. Looking at you, here, Dense.