Tourism is now a commercial activity. The island had a population of over one thousand in the 19th century. Its current permanent population is around 125. This is swollen by visitors in the summer, with most coming to view the cliffs and their huge seabird populations. Many visitors come for the day, and the island has around 30 beds for overnight visitors. The Boathouse Visitors' Centre at Church Bay is open seven days a week from April to September, with minibus tours and bicycle hire also available. The island is also popular with scuba divers, who come to explore the many wrecked ships in the surrounding waters.