Giant's Causeway, County Antrim, Northern Ireland, United Kingdom (© Nando Pizzini Photography/Getty Images)
【March 17 2014】Violent volcanic activity rocked the northeastern region of Ireland 50 to 60 million years ago, resulting in the formation of what we now call the Giant's Causeway. The strange, mostly hexagonal, basalt columns interlock so tightly that it's no wonder the ancient Celts believed the stones were part of a bridge to Scotland built by a giant.Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..