What I find interesting about Cotswolds is that where other zoos in the country with perhaps architecture of several decades of age will try and be quick to replace it [seemingly with varying results], it seems that Cotswolds has a fine balance between preserving existing architecture and making sure the park does not stagnate. And quite nicely, it confidently continues doing what it does right - 'if it ain't broke, don't fix it.'
Part of me thinks that the architecture of the park has not changed dramatically since about 10 years ago, but even still, Cotswolds manages to make room for new arrivals - which are almost always nice to have in the park. [Tamandua, Hammerhead bat, Cassowary - no lego brick to be seen around here!]