yeah, I just thought of that. I don't think there are many zoos that undergo so much focus on the Lions as much as the SDWAP does, as in education, conservation, and entertainment. I haven't been to a zoo with a dynamic lion exhibit like this, actually, I'd say good tiger enclosures are much more common than good lion enclosures...
If you want to see a really good lion exhibit then come check out lions on the edge at Werribee Open Range Zoo here in Australia. It's simply fantatstic.