anatomy audience cartoon clip art clipart crowd diverse diversity eyes faces graphic group illustration meeting men overcrowded painting people spectators team animal-care animal-welfare animals appalling-conditions appearance barred bars cages care concrete confined construction damaged decay deteriorated deterioration dilapidated disused early example exhibit exterior external historical history inadequate inappropriate inferior-facilities open outdated past Remains reminder restricted restrictions secure security set-aside shadows stones stonework structure sunlight sunshine unacceptable welfare zoo