The Manilla Zoo has only one female elephant. This article is about her care and the controversy that PETA is stirring up. Has anybody here been to the Manilla Zoo? http://www.nytimes.com/2012/10/15/world/asia/a-very-big-issue-at-manilas-zoo.html?src=rechp&_r=0
Yes, I have and will acknowledge she was in a smallish conventional exhibit. It was far removed from any of the modern standard elephant habitats in zoos, but I would not say it was that bad on their single elephant.
Another article about Mali the elephant : The world's loneliest elephant has been kept all alone in concrete 'jungle' since 1977 - Mirror Online