High Quality Content by WIKIPEDIA articles! Wolf Rock is a treacherous rock located 9 nautical miles (17 km; 10 mi) east of St Mary`s, Isles of Scilly and 4 nautical miles (7.4 km; 4.6 mi) southwest of Land`s End, in Cornwall, United Kingdom. A lighthouse, known as the Wolf Rock Lighthouse, was built on the rock by James Walker from 1861 to 1869; it entered service in January 1870.