Carrick-a-Rede is the short, easy one: about an hour and a half of cliffs, caves and waterfalls, built for families. The Rathlin tours are the wildlife trips: seals, seabirds and lighthouses, with puffins from April to mid-August. Wild Rathlin adds a whole hour ashore, and Round Rathlin is the full loop: all three lighthouses and the whole coastline from the water.