11. The Giant’s Causeway
The Giant’s Causeway, located in County Antrim, Northern Ireland, is a UNESCO World Heritage Site renowned for its approximately 40,000 interlocking basalt columns formed by volcanic activity around 60 million years ago. This geological marvel has inspired numerous myths, notably the legend of the Irish giant Finn McCool, who is said to have built the causeway to confront his Scottish rival, Benandonner (giantscauseway.ccght.org).
