Okay. I'm looking for someone to visit nine of these sites with a friend (it all has to be the same person and friend). I'm not actually sure how close any of these items are, but over in Delaware there seems to be a grouping (they are probably still far apart?).
This is the map that goes with it.
1. Grand Canyon, AZ
2. Bryce Canyon National Park, UT
3. Craters of the Moon National Monument, ID
4. Yellowstone National Park, WY
5. Pikes Peak, CO
6. Carlsbad Caverns National Park, NM
7. The Alamo, TX
8. The Platt Historic District, OK
9. Toltec Mounds, AR
10. Elvis Presley’s Graceland, TN
11. Vicksburg National Military Park, MS
12. French Quarter, New Orleans, LA
13. USS Alabama, AL
14. Cape Canaveral Air Force Station, FL
15. Okefenokee Swamp Park, GA
16. Fort Sumter National Monument, SC
17. Lost World Caverns, WV
18. Wright Brothers National Memorial Visitor Center, NC
19. Mount Vernon, VA
20. White House, Washington, DC
21. Colonial Annapolis Historic District, MD
22. New Castle Historic District, Delaware
23. Cape May Historic District, NJ
24. Liberty Bell, PA
25. Statue of Liberty, NY
26. The Mark Twain House & Museum, CT
27. The Breakers, RI
28. USS Constitution, MA
29. Acadia National Park, ME
30. Mount Washington Hotel, NH
31. Shelburne Farms, VT
32. Fox Theater, Detroit, MI
33. Spring Grove Cemetery, OH
34. Mammoth Cave National Park, KY
35. West Baden Springs Hotel, IN
36. Abraham Lincoln’s Home, IL
37. Gateway Arch, MO
38. C. W. Parker Carousel Museum, KS
39. Terrace Hill Governor’s Mansion, IA
40. Taliesin, WI
41. Fort Snelling, MN
42. Ashfall Fossil Bed, NE
43. Mount Rushmore, SD
44. Fort Union Trading Post, ND
45. Glacier National Park, MT
46. Hanford Site, WA
47. Columbia River Highway, OR
48. San Francisco Cable Cars, CA
49. San Andreas Fault, CA
50. Hoover Dam, NV