First, visit historic POINSETT BRIDGE, the oldest bridge in South Carolina. Built in 1820 of locally quarried stone, it was one of three bridges on the Old State Road, a toll road from Charleston to Asheville, N.C. At the junction of Scenic Hwy 11 with Highway 101 and State Road H912, take H912 for 1.6 miles; turn right on Callahan Mt. Road; go …