Formerly a giraffe enclosure, with this viewing area being the raised platform from where the giraffes could be fed. The ground level has been built up. The enclosure extends off to the right as well (it is much larger than it appears here). The front viewing area with the waterfall - see Sun Bear enclosure (front view) | ZooChat - is to the left of this photo.
The cage visible in the rear is for the Sumatran Tigers.