Known for the thousands of hexagonal columns rising vertically like a staircase, Giant's Causeway is a geological wonder that at first glance looks like something that human hand could make. Unusual formations were created by the natural process during the Palaeogenesis (65-23 million years ago) when Northern Ireland was influenced by strong volcanic activities. In the case of Giant's Causeway, nature showed its mathematical ingenuity in a spectacular way, creating tens of thousands of multilateral columns that are packed together like so many giant hexagonal pencils. It provides pedestrians the ability to cross over the tops of the pillars, 800 meters to the sea.
This is a favorite location for many seabirds such as gulls, auks, grebes and others, but also of an unusual plant species like a sea anemone, squill or orchids.
Giant's Causeway was added to the UNESCO list of World Heritage Sites in Europe in 1986 as "a unique example of rapid cooling of basaltic lava penetrating through the limestone plateau, thereby collapsing vertically in the form of connected columns."