Iain Miller and Paulina Kaniszewska recently climbed Dún Briste sea stack, off Downpatrick Head, in Mayo, Ireland. This was the first successful climb of the daunting landmark since 1990, as reported here. Judging by this breathtaking but terrifying video, it’s easy to see why there have been so few attempts at climbing this incredible feat of nature. Credit: YouTube/Iain Miller