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
The Holy Cave, Hunterston 19th century. The visible remains suggested a souterrain, but the near absence of records of these in south-west Scotland make this unlikely. The passage is lined with corbelled drystone walling, roofed with capstones, and leads into a natural cave section which may have been formed by wave action as it shows a water-scour likely to have been created by wave action. Some areas of undisturbed stratified deposits have been found, together with evidence of occupation, such as a hearth, bones, and a fragment of glass. A similar cave or rock shelter survives on Holy Isle (off the east coast of