Cache is not at the posted coordinates.
Take a leisurely walk from along the rail trail once more to take in the sights with the "Art Along South End IV" Adventure Lab.
In each journal page you'll get part of the coordinates. You'll find the final cache here:
N35 12.AEE
W80 51.BDC
The cache is on the opposite side of the train tracks from the rail trail. Cross the tracks only at the marked pedestrian crosswalks. It's not necessary to venture onto the tracks or cross any fences. The cache is accessible via sidewalks and paths.
https://adventurelab.page.link/zoGn