Small Skellig is long, low and craggy: from a distance it looks as if it's shrouded in a swirling snowstorm. Close up you realise you're looking at a colony of over 23,000 pairs of breeding gannets, the second-largest breeding colony in the world. Most boats circle the island so you can see the gannets and you may see basking seals as well. Small Skellig is a bird sanctuary; no landing is permitted.