The Farne Islands are a group of islands off the coast of Northumberland, England. The group has between 15 and 20 islands depending on the level of the tide. They form an archipelago, divided into the Inner and the Outer Group. The main islands in the Inner Group are Inner Farne, Knoxes Reef, the East and West Wideopens, and the Megstone; the main islands in the Outer Group are Staple Island, Brownsman, North and South Wamses, Big Harcar, and Longstone. The two groups are separated by Staple Sound. The highest point on Inner Farne is 19 metres (62 ft) above mean sea level and on Staple Island is 14 metres (46 ft).