Giant's Causeway with higher saline content than that found at the causeway. Although the basaltic columns of the Giant's Causeway are impressive, they are not unique. Basalt columns are a common volcanic feature, and they occur on many scales (because faster cooling produces smaller columns). The Belfast-Derry railway line run by Northern Ireland Railways connects to Coleraine and along the Coleraine-Portrush branch line to Portrush. Local Ulsterbus provide connections to the railway stations. There is a scenic walk of 7 miles from Portrush alongside Dunluce Castle and the Giant's Causeway and Bushmills Railway. Giant's Causeway The Giant's Causeway is an area of
S bridge part of the original National Road, which was built circa 1825. The S Bridge in Berks County, Pennsylvania, and the Claysville S Bridge in Washington County, Pennsylvania, are listed on the National Register of Historic Places. Another S bridge, in Anderson County, Kentucky, is located on U.S. Route 62 east of Lawrenceburg. It has undergone major roadway replacement and has been widened. Another S bridge of note is located in Hertford, North Carolina. It connects a causeway from Winfall to the Town of Hertford, over the Perquimans River. S bridge An S bridge is a bridge whose alignment follows a