In case you didn't know already, this year, America's National Park Service is 100 years old — and to celebrate, we're disclosing a few of the country's best-kept secrets.

As well as offering the most spectacular hiking trails, there's something about these glorious parts of the wilderness that creates a sense of national pride. They're a part of American history and thanks to their status, help to keep nature wild and preserve some of the country's most beautiful places. Read on for a list of some of the best.

1. Selma to Montgomery, Alabama
2. Denali, Alaska
3. Grand Canyon, Arizona
4. Buffalo, Arkansas
5. Yosemite, California
6. Great Sand Dunes, Colorado
7. New England Trail, Connecticut
8. First State, Delaware
9. Everglades, Florida
10. Cumberland Island, Georgia
11. Haleakala, Hawaii
12. Craters of the Moon, Idaho
13. Lincoln Home, Illinois
14. Indiana Dunes, Indiana
15. Effigy Mounds, Iowa
16. Brown v. Board of Education, Kansas
17. Tallgrass Prairie, Kansas
18. Mammoth Cave, Kentucky
19. Atchafalaya, Louisiana
20. Acadia, Maine
21. Assateague, Maryland
22. Cape Cod, Massachusetts
23. Sleeping Bear Dunes, Michigan
24. Voyageurs, Minnesota
25. Gulf Islands, Mississippi
26. Pony Express, Missouri
27. Glacier, Montana
28. Scott’s Bluff, Nebraska
29. Great Basin, Nevada
30. Appalachian Trail, New Hampshire
31. Delaware Gap, New Jersey
32. Gila Cliff Dwellings, New Mexico
33. Hudson River Valley, New York
34. Blue Ridge Parkway, North Carolina
35. Lewis and Clark, North Dakota
36. Cuyahoga Valley, Ohio
37. Chickasaw, Oklahoma
38. Crater Lake, Oregon
39. Gettysburg, Pennsylvania
40. Blackstone River Valley, Rhode Island
41. Congaree, South Carolina
42. Badlands, South Dakota
43. Great Smoky Mountains, Tennessee
44. Big Bend, Texas
45. Zion, Utah
46. Marsh-Billings-Rockefeller, Vermont
47. Shenandoah, Virginia
48. Olympic, Washington
49. New River Gorge, West Virginia
50. Apostle Island, Wisconsin
51. Grand Teton, Wyoming