Giant’s Causeway
Giant’s Causeway is an area of about 40,000 interlocking basalt columns, the result of an ancient volcanic eruption. The tops of the columns form stepping stones that lead from the cliff foot and disappear under the sea.The tallest are about 12 metres (36 ft) high, and the solidified lava in the cliffs is 28 metres thick in places. It is located on the north-east coast of Northern Ireland, about 3 kilometres (2 miles) north of the town of Bushmills. It was declared a World Heritage Site by UNESCO in 1986.