1 afam African American Civil War Memorial
2 auca Augusta Canal National Heritage Area
3 bepa Belmont-Paul Women's Equality National Monument
4 bicy Big Cypress National Preserve
5 brca Bryce Canyon National Park
6 cane Camp Nelson National Monument
7 caco Cape Cod National Seashore
8 chpi Charles Pinckney National Historic Site
9 cuva Cuyahoga Valley National Park
10 drto Dry Tortugas National Park
11 efmo Effigy Mounds National Monument
12 elma El Malpais National Monument
13 fila First Ladies National Historic Site
14 fobo Fort Bowie National Historic Site
15 foda Fort Davis National Historic Site
16 fost Fort Stanwix National Monument
17 frdo Frederick Douglass National Historic Site
18 frsp Fredericksburg & Spotsylvania National Military Park
19 frhi Friendship Hill National Historic Site
20 gaar Gates Of The Arctic National Park & Preserve
21 gari Gauley River National Recreation Area
22 glec Glen Echo Park
23 goga Golden Gate National Recreation Area
24 gois Governors Island National Monument
25 hart Harriet Tubman National Historical Park
26 jame Historic Jamestowne Part of Colonial National Historical Park
27 pima Hohokam Pima National Monument
28 kefj Kenai Fjords National Park
29 knri Knife River Indian Villages National Historic Site
30 kowa Korean War Veterans Memorial
31 linc Lincoln Memorial
32 long Longfellow House Washington's Headquarters National Historic Site
33 manz Manzanar National Historic Site
34 mava Martin Van Buren National Historic Site
35 auto Motor Cities National Heritage Area
36 avia National Aviation Heritage Area
37 nace National Capital Parks-East
38 niob Niobrara National Scenic River
39 orpi Organ Pipe Cactus National Monument
40 ozar Ozark National Scenic Riverways
41 para Parashant National Monument
42 pete Petersburg National Battlefield
43 sahi Sagamore Hill National Historic Site
44 sacn Saint Croix National Scenic Riverway
45 sapu Salinas Pueblo Missions National Monument
46 sari Salt River Bay National Historical Park and Ecological Preserve
47 saan San Antonio Missions National Historical Park
48 thro Theodore Roosevelt National Park
49 thje Thomas Jefferson Memorial
50 york Yorktown Battlefield Part of Colonial National Historical Park