Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. complexes (buildings and sites)
6. [complexes by function]
7. zoos (built complexes)
8. open-air zoos

Anotations

Scope note:

Distinguished from "safari parks" by the complete and planned separation of the visiting public from the animals, who are allowed to roam freely within bounded natural habitats. Distinguished from "safari parks" by the complete and planned separation of the visiting public from the animals, who are allowed to roam freely within bounded natural habitats.