The St. Louis Zoo's 228-foot-long free-flight one has been there since the 1904 World's Fair
The following people have served as directors of the zoo: ... and is 
still one of the world's largest free-flight aviaries at 228 feet (69 m) long, 84 feet (
26... [DOC] [TLE] Aviary - Wikipedia [PAR] An aviary is a large enclosure for confining birds.