Island has a rope bridge erected by salmon fishermen every summer between
May and September. They use it to gain access to the island to net migrating
salmon just off the island. These salmon are returning from feeding
grounds in the Atlantic and are returning to the rivers in which they
were born, such as the Roe, the Foyle and the Bush, to spawn. The rope
bridge is a popular honeypot for tourists and the National Trust now
own the access to the bridge. The island itself is a dolerite plug and
volcanic tuffs can are exposed on the cliffs opposite the island.