The National Aviary, located in Pittsburgh, Pennsylvania, is the only independent indoor nonprofit aviary in the United States. It is also the country's largest aviary, and the only one accorded honorary "National" status by the United States Congress.
The aviary is home to more than 500 birds representing more than 150 species, and is a member of the Association of Zoos and Aquariums.
Wikipedia https://en.wikipedia.org/wiki/National_Aviary
Official Website https://www.aviary.org/
Coordinates 40°27'11.835" N -80°0'36.132" E