This Tunnel is in Scott county, Virginia; but was so little known beyond
its immediate neighbourhood, as to induce Lieut.-Col. Long, (U.S. Army,)
to communicate its description to Mr. Featherstonhaugh's _American
Journal of Geology and Natural Science_; and the following narrative
of the Colonel's Excursion will be read with interest:--

"During the past summer, I visited a remarkable natural bridge in Scott
county, Virginia, to which I have given the name of Natural Tunnel, on
account of its striking resemblance to artificial structures of that
kind.

"The immediate locality of this tunnel is upon a small stream called
Buck-eye, or Stock Creek. This last name owes its origin to its valley
having been resorted to by the herdsmen of the country, for the
attainment of a _good range_, or choice pasture-ground, for their
cattle. The creek rises in Powell's mountain, and is tributary to Clinch
river, which it enters at the distance of between two and three miles
below the tunnel. The aspect of the surrounding country, and especially
of that to the northward of the tunnel, and constituting the southerly
slope of the mountain just mentioned, is exceedingly diversified, and
broken by elevated spurs and ridges, separated from each other by deep
chasms, walled with cliffs and mural precipices, often presenting
exceedingly narrow passes, but occasionally widening into meadows or
bottoms of considerable extent. The mural precipices just mentioned
occur very frequently, bounding the valleys of the streams generally in
this part of the country, and opposing ramparts of formidable height,
and in many places utterly insurmountable. Such are the features
peculiarly characteristic of _Wild Cat Valley_, the _Valley of
Copper Creek_, of Powell's and Clinch rivers, and of numerous other