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
Cave-In-Rock, Illinois 43.8% of those under age 18 and 24.1% of those age 65 or over. Cave-in-Rock's primary feature is a striking riverside cave formed by wind and water erosion and by cataclysmic effects of the 1811–12 New Madrid earthquakes. The cave is located at , just upriver (east) from the village. The first European to come across it was M. de Lery of France, who found it in 1739 and called it ""caverne dans Le Roc"". Other names for the cave include Rock-In-Cave, Rocking Cave, Rock-and-Cave, House of Nature, The Cave, Big Cave, and Murrell's Cave. The cave is the main