The gap creek at the Cumberland Gap National Historical Park flows out of a cave at the top of the mountain. The stream meanders its way down the side of the mountain passing through the Cumberland Gap that Daniel Boone blazed. This is a long exposure shot behind the Iron Furnace looking up the mountain.

Camera: Nikon D7100
Lens: Nikkor 18-55mm
Tripod: Manfrotto
Filter: CPL
Shutter Release: Zeikos
Focal Length: 18 mm
Shutter Speed: 13/10 sec
Aperture: ƒ/11
ISO: 100