I remember the first time I saw this enclosure at Edinburgh. It seemed very small, especially for Lions.
It was roughly where the outside area for the Koalas is now.
It wasn't only small, they seamed rather far off too, it was of it's time I suppose when it was thought cats lye around all day so they won't need much space.
This exhibit held lions from when it was opened up until 2002 when the last African female Judi died. The Asiatic lion enclosure was built the year after.