Natural Bridge, Virginia. The Natural Bridge of Virginia is located in Rockgridge County, a few miles to the west of the Blue Ridge Mountains. Length of bridge 90 feet; width average 100 feet; height 215 feet; 40 feet thick. Granted from George III on July 5, 1774 to Thomas Jefferson 157 acres, which included the bridge on Cedar Creek which flows under it." Post Card No. 118, postmarked August 5, 1947.