County Antrim’s Giant’s Causeway: Located on the Causeway Coast between Portrush and Ballycastle, this World Heritage Site defies the imagination. Over 37,000 basalt columns, most hexagonal and 12 inches across create patterns that are quite similar, but unique formations like the Chimney Stacks, the Wishing Chair, Organ Pipes and Aird’s Snout will intrigue the visitor. Built by Finn MacCool? Perhaps, but only if he was around 61 million years ago when the formation of the Causeway began.