We noticed several piles of rock along the trail. They didn't appear to be part of a wall or anything else that we could think of.
Album: Cosby Creek Trail
Creation Date: July 4, 2016
Camera: NIKON CORPORATION / NIKON D5100
Lens: Nikon AF-S DX VR Zoom-Nikkor 18-55mm f/3.5-5.6G
Aperture: f/5.3
Focal Length: 40 mm
Exposure Time: 0.016666666666666666
ISO: 3200
MeteringMode: 5
Creation Date: July 4, 2016
Camera: NIKON CORPORATION / NIKON D5100
Lens: Nikon AF-S DX VR Zoom-Nikkor 18-55mm f/3.5-5.6G
Aperture: f/5.3
Focal Length: 40 mm
Exposure Time: 0.016666666666666666
ISO: 3200
MeteringMode: 5