The Giant’s Causeway, Northern Ireland’s only UNESCO World Heritage Site, is a natural pavement of an estimated 37,000 black basalt columns, each one a polygon with hexagons being the most common, projecting from the mainland into the Atlantic Ocean. Volcanic eruptions that occurred about 60 million years ago, give or take a few years, slowly and evenly cooled to form the otherworldly geometric shapes, forming a striking visual landscape that make the Causeway the major tourist attraction th...