Big Spring Bog Natural Area Preserve
Encyclopedia
Big Spring Bog Natural Area Preserve is a Natural Area Preserve
Virginia Natural Area Preserve System
The Virginia Natural Area Preserve System is a system of protected areas in the state of Virginia. It was established in the late 1980s to protect sites that were designated as among the most significant natural areas in the state...

 located in Grayson County, Virginia
Grayson County, Virginia
As of the census of 2000, there were 17,917 people, 7,259 households, and 5,088 families residing in the county. The population density was 40 people per square mile . There were 9,123 housing units at an average density of 21 per square mile...

. The terrain is hill
Hill
A hill is a landform that extends above the surrounding terrain. Hills often have a distinct summit, although in areas with scarp/dip topography a hill may refer to a particular section of flat terrain without a massive summit A hill is a landform that extends above the surrounding terrain. Hills...

y, and within its borders is Chestnut Creek
Chestnut Creek
-References:**USGS Hydrologic Unit Map - State of Virginia...

, a tributary of the New River. The preserve features a rare wetland
Wetland
A wetland is an area of land whose soil is saturated with water either permanently or seasonally. Wetlands are categorised by their characteristic vegetation, which is adapted to these unique soil conditions....

 known as a Cranberry Glades.
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