The Giants Causeway is a site in Northern Ireland on the UNESCO World Heritage Site list since 1986. It is an area with about 40,000 interlocking basalt columns, the result of an ancient volcanic eruption. This is in fact the most popular tourist attraction in all of Northern Ireland, so if you are interested in great nature and World Heritage sites, The Giants Causeway is a place to visit. Earlier a Visitors Centre was located here, but since it burned down they are still waiting for a new one to be finished. Hopefully it will get finished in 2012, but only time will show!
If you want to join in on a day trip to The Giants Causeway from Dublin you are lucky, as most tours visiting this area also includes a visit to Belfast. Some also include a visit to Carrick where you can walk across the “Rede Rope Bridge.” Read more about these tours and prices using the links further down.