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America's greatest parks are explored in this documentary series.
1970
6.2
2022
7.5
2016
6.8
1976
8.0
2000
1995
6.4
7.2
2009
2004
7.3
2010
2008
7.6
1997
6.3
1994
2002
8.1
2005
1999
8.7
1989
8.3
2015
