I visited Giant's Causeway in the spring of 2017 by driving half the island of Eire from Dublin to see the unique natural phenomenon. The Causeway is the result of volcanic activity dating back 50-to-60 million of years. The cooling lava shaped itself over time as several clusters of basalt columns of differing height, each no more than a couple of feet in diameter. Most of the columns are hexagonal in shape, but the number of sides can vary between four and eight. In their mass, they look precisely like a causeway for getting into – or out of – the sea. Local legends ascribed its creation to the mythological giant Finn McCool, who was challenged to a fight by an unfriendly giant from Scotland and needed to build a way across the sea for the two of them to meet. Hence, the Giant’s Causeway. On the Scottish island of Staffa there are similar basalt columns, corroborating the folklore. The lively audioguide issued to every paying visitor gets a lot of play out of the legend.

The core of the site, where those basalt clusters are concentrated, is relatively compact, but the surrounding coastal area has miles of trails to explore and offers plenty of other rock formations of interest, from Giant's Boot to Giant's Organ. Budget three to four hours for a proper exploration of the site. If the weather is good, you may decide to extend your stay. It is a unique and incredible site, capable of impressing even a relative nonadmirer of natural wonders.

The visitor center, opened just a few years ago, is a pretty amazing structure built into the curves of the terrain. It is technically just a gateway to the World Heritage site, not part of the site itself, but worth checking out.

Giant’s Causeway is situated on the northern coast of the Emerald Isle. It is more than three hours away by car from Dublin, which has to be at the outer edge for a comfortable day trip for most people. From Belfast and most locations in Northern Ireland, it is only about an hour away.