Northern Ireland: let's be honest, it's probably not number one on your holiday destination wishlist. If you want the UK's dramatic coastline and wilderness,  you're going to be pulled by the romantic allure of the Scottish Highlands. And if you're going to the Irish mainland, you want to hear that famous accent of theirs while being served the black stuff in a pub frequented by some long-dead famous poet.

But Northern Ireland has its wonders too, and Giant's Causeway is one of them. It's the result of an ancient volcanic eruption and features some 40,000 hexagonal basalt columns.