1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962

1900s
1910s
1920s
1930s
1940s
1950s
1960s
1970s
1980s
1990s
2000s

Categories

Categories:

1957 establishments
1957 in the environment
Protected areas established in the 1950s
Protected areas by year of establishment