This is easily the biggest grapevine I have ever seen. The trunk on top in the frame center is way bigger than my thigh, probably close to the size of my waist.  Just compare the size of the leaves to it.

Vitis sp., wild. Schoolhouse Ridge South, Harpers Ferry National Historical Park.

50mm Zeiss Makro-Planar ZF.2, Nikon 800e, Lr4, Ps CS6.