visitors can enter through wire netted doors and curtains of cords. The Snowdon Aviary in London Zoo was designed by Antony Armstrong-Jones, 1st Earl of Snowdon, Cedric Price and Frank Newby, and built in 1962–1964. The Bronx Zoo's World of Birds, a two-story bird house completed in 1972, is a huge, landscaped, indoor free-flight exhibit. The one-way flow pattern in the exhibit moves the visitors through twenty-five birds habitats, ranging from desert to tropical forest. Each setting recreates with impressive fidelity the microculture of the birds that fly merrily about within their diorama world, complete with living plants. Five of the aviaries are completely open: in two of the largest the uncaged public walks through the habitat with birds freely overhead. The Henry Doorly Zoo's Simmons Aviary opened in 1983 and is one of the world's largest free-flight aviaries. About 500 birds from all parts of the world occupy the area of the aviary. In this exhibit, visitors see flamingos, ducks, swans, storks, cranes, spoonbills, ibis and egrets. The Aviary is long and rises to at the center. The structure of two-inch nylon mesh is supported by a system of cables and poles. The use of nylon instead of wire is a unique concept. Birds of Eden bird sanctuary, located in the Western Cape of South Africa, is possibly the largest free flight aviary in the world. The aviary opened in 2005 and covers an area of with a total volume of . It is home to around 3,000 individual birds from 200 species. List of public aviaries Hamilton Aviary, Hamilton, Ontario, Canada Bird Kingdom, Niagara Falls, Ontario, Canada Birds of Eden, Western Cape, South Africa Bloedel Floral Conservatory, Vancouver, British Columbia, Canada Butterfly World, Coconut Creek, Florida, United States Clissold Park, Hackney, United Kingdom Edward Youde Aviary, Hong Kong, China Flamingo Gardens, Davie, Florida, United States Flying High Bird Sanctuary, Apple Tree Creek, Australia Jurong Bird Park, Jurong, Singapore Kobe Kachoen, Kobe, Japan Kuala Lumpur Bird Park, Kuala Lumpur, Malaysia Living Coasts, Torquay, Devon, United Kingdom Melaka Bird Park, Melaka, Malaysia National Aviary, Pittsburgh, Pennsylvania, United States Turtle Back Zoo, New Jersey, United States Miami Metro Zoo, Florida, United States Palmitos Park, Canary islands, Spain Parque das Aves, Foz do Iguaçu, Brazil Snowdon Aviary, London, United Kingdom Tracy Aviary, Salt Lake City, Utah, United States Voliere Zürich, Enge (Zürich), Switzerland Waddesdon Manor's Aviary, United Kingdom Weltvogelpark Walsrode, Germany Shukavana