The Giant’s Causeway, renowned for its polygonal columns of layered basalt, is the only World Heritage Site in Northern Ireland. Resulting from a volcanic eruption 60 million years ago, this is a designated Area of Outstanding Natural Beauty and has attracted visitors for centuries. It harbours a wealth of local and natural history that can be enjoyed from the North Antrim Coastal Path. What’s new in 2004: Interpretation panels illustrating the geological, natural and historical interest of the site