The Isle of May is located in the north of the outer Firth of Forth, approximately off the coast of mainland Scotland. It is about long and wide. The island is owned and managed by NatureScot as a national nature reserve. There are now no permanent residents, but the island was the site of St Adrian's Priory during the Middle Ages. Most visitors to the island are daytrippers taking the ferry from Anstruther in Fife, although up to six visitors can stay at the bird observatory, usually for a week at a time. The only way to get there is by ferry; the journey takes 45 minutes from the small harbours of Anstruther and Crail, and also from North Berwick. As of 2015, around 11,000 people visit the island each year. The island is closed to visitors from 1 October until Easter to prevent disturbance to the large number of seal pups. The Scottish Seabird Centre at North Berwick has two live cameras on the island, which can be remotely controlled by visitors, to allow close viewing of the seabird cities, including puffins, guillemots, razorbills, shags, cormorants and terns and the fluffy grey seal pups in winter, without disturbance. The Scottish Seabird Centre also runs boat trips to the Isle of May. As well as its natural heritage, the Isle of May also has a rich cultural heritage, including St Adrian's Chapel, which is a Scheduled Ancient Monument. Furthermore, the Isle of May Lighthouse; Keepers' Houses; North and South Horns; the Low and Light Cottages; the Coal Store and Stable Block; and the former Lighthouse Beacon have all been included in the list of Buildings of Special Architectural or Historic Interest. Geography and geology The island is around 1.5 km long and 0.5 km wide, with an area of about 57 ha. The western coast of the island consists of cliffs that are up to 45 metres in height. The land tilts from here down to the eastern shore, which is mostly rocky with three small beaches: Pilgrims Haven, Kirkhaven and Silver Sands. There is a peninsula in the north, known as Rona, which is almost a separate island, being cut off from the main island at high tide. Geologically, the island is composed of a "fine grained basalt of a dark-grey colour with tinges of green and greenstone". It is crossed by a series of faults that run west–east