Absolutely. I loved it too. I'd find the opportunity to be allowed to wander around the likes of many of the old Victorian era grounds like Boundary Park, Gigg Lane or Spotland far more interesting than joining rip off organised tours of the more modern and 'up to date' mega stadia,
True, Athletico are very much Real's poor cousins though. It's a bit like wandering around Boundary Park compared to a tour of Old Trafford or the Etihad.