We're fortunate to live near the Nature Conservancy's 
Falls Ridge Preserve. Tucked into a narrow, flat valley near the North Fork of the Roanoke River, it's only about 15 minutes from the house. Falls Ridge is a 655 acre preserve described by the 
Nature Conservancy as:
Part of a steep, rugged ridge that rises  from the valley of the North  
Fork of the Roanoke River, Falls Ridge  Preserve boasts a spring-fed  
travertine waterfall approximately 80 feet  in height.    Salem 
Fault runs through the preserve, dividing it  into two different  rock 
types-Precambrian limestone and  shale/sandstone. The corresponding  
difference in soil types generates a  diversity of vegetation,  
particularly wildflowers and smaller flora.
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| Sign on a bridge downstream from the waterfall. | 
To get there, you drive down North Fork Road, take a right, cross a rickety bridge over the North Fork of the Roanoke River, carefully cross the railroad tracks, then park at the end of this field:
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| That's our car, way down at the end of the field. | 
The travertine stream waterfall isn't typical in this part of the country - most waterfalls tumble over granite and are very "rocky." Falls Ridge, however, is distinguished by the limestone sediment. Again citing the Nature Conservancy:
The  rocks in the travertine falls watershed grew steadily, as minerals 
 and  lime dissolved in the water precipitate upon them. Over thousands 
 of  years, the build-up of calcium carbonate steepened the stream's   
gradient and slowly created both the waterfall and one of the   
largest-known exposed travertine deposits. Large sinkholes on part of   
the land also indicate the existence of underlying caverns which have   
never been explored. 
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| The falls. | 
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| Barrie on the stairs going down to the falls overlook.  It was a chilly day. | 
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| Another view of the falls. | 
The trail winds up around the falls, then levels off, where it wanders along atop some sandstone cliffs. 
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| Cliffs to the right of us, stream to the left. | 
 The trail wanders back down to the creek.  The cliffs are to the left, another trail to the right.  
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| Barrie heading down the trail | 
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| Sandstone cliffs with lots of little caves. The folks in the distance just stepped out of a cave when I took this picture. | 
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| The stream below the waterfall. | 
This land was donated to the Nature Conservancy in 1974. It has an interesting past, as befits such a rich, fertile field and stream located near the towns of Blacksburg and Roanoke. Again citing the Nature Conservancy:
A large Indian settlement was located upstream of Falls Ridge Preserve 
on the North Fork of the Roanoke River, but the only direct evidence of 
Indian activity has been the discovery of a few white flint arrowheads. 
In 1823, the Governor of Virginia granted to the Birchfield family 700 
acres of land, encompassing part of the present day preserve. A local 
family, the Dudleys, later acquired the land and used it not only for 
farming but also to operate several enterprises: a wool carding mill, 
general store, post office, lumber milk gram mill and a livery. In 1939,
 a kiln to produce burnt lime was installed at the falls by Harry 
Dudley. Calcium carbonate cliffs (travertine) deposited by the stream 
were blasted loose, crushed and carted by mule to the top of the kiln. 
Traces of this operation can be seen near the falls.
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| The lime kiln at Falls Ridge. |