A geologist’s dream, the extraordinary rock formations on the coastline of Northern Ireland’s County Antrim is a sight you’ll have to see to believe. The result of volcanic eruptions around 50-60 million years ago, the Giant’s Causeway is made up of some 40,000 huge basalt columns protruding from the shore. Despite knowing the science behind the site, the ethereal and mighty beauty of the Causeway makes it easy to understand why ancients believed it simply couldn’t be natural. Labelled the handiwork of giant Fin McCool, this striking sight has inspired Irish folklore for centuries, with tales still told by locals today. Whether you’re partial to the scientific or the mythical, there’s plenty to keep you busy at this Northern Irish gem.