Northern Ireland, Giant's Causeway

The Giant's Causeway is an area of about 40,000 interlocking basalt columns, the result of an ancient volcanic eruption. It is located in the northeast coast of Northern Ireland. It was declared a World Heritage Site by UNESCO in 1986, and a national nature reserve in 1987 by the Department of the Environment for Northern Ireland. The tops of the columns form stepping stones that lead from the cliff foot and disappear under the sea. Most of the columns are hexagonal, although there are also some with four, five, seven or eight sides. The tallest are about 12 metres high, and the solidified lava in the cliffs is 28 metres  thick in places.

Giant's Causeway and Causeway is one of the most popular tourist attractions in Northern Ireland.The remainder of the site is owned by the Crown Estate and a number of private landowners.