You must get permission to go on the land here.  The depression here called Water Sinks is referred to as a blind valley.  Here is the description of the area:

"This blind valley is a closed topographic depression that is the terminal sink point of several surface streams, most of which are intermittent streams.  The southern part of the Water Sinks depression is a 1.6-km-long flat field named the Pancake Field on the southeast side of U.S. Route 609.  Sinking Creek and Water Sinks Creek are two of the intermittent streams that flow into the Water Sinks depression."  Stop 3-1 Swezey et al.  

• Page 113 - Swezey, C. S., et al., 2017, Geologic controls on cave development in Burnsville Cove, Bath and Highland Counties, Virginia: Geol. Soc. Am. Field Guide 47, p. 89-123.