Steam engine 'Excelsior', of The Great Whipsnade Railway, descends through the Passage through Asia section. Herds of Père David's deer (Elaphurus davidianus) and fallow deer (Dama dama) in foreground.
I wonder what sizes are typically deer parks and similar enclosed spaces where ungulates like red or fallow deer, blackbuck etc. live not physically separated from visitor paths. And what are the smallest / narrowest successful examples?