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Category:Protected areas established in 1923
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Protected areas established by year
1920
1921
1922
1923
1924
1925
1926
Years
1920
1921
1922
1923
1924
1925
1926
Pages in category "Protected areas established in 1923"
The following 15 pages are in this category, out of 15 total.
A
Allegheny National Forest
Appalachian Trail
Arrow Rock State Historic Site
Aztec Ruins National Monument
B
Bennett Spring State Park
C
Campbell Falls State Park Reserve
H
Hopewell Culture National Historical Park
Hovenweep National Monument
L
Lake Bemidji State Park
M
Mound City Group National Monument
N
National Petroleum Reserve–Alaska
P
Petit Jean State Park
Pilot Knob State Park
Pipe Spring National Monument
T
Tully Gorge National Park
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Protected areas established in the 1920s
1923 in the environment
1923 establishments
Protected areas by year of establishment
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