Currane, Dooega and Slievemore. Others emigrated to America. Archaeology Recent archaeological research suggests the village was occupied year-round at least as early as the 19th century, though it is known to have served as a seasonally occupied 'booley village' by the first half of the 20th century. A booley village (a number of which exist in a ruined state on the island) is a village occupied only during part of the year, such as a resort community, a lake community, or (as the case on Achill) a place to live while tending flocks or herds of ruminants during winter or summer pasturing. Specifically, some of the people of Dooagh and Pollagh would migrate in the summer to Slievemore and then go back to Dooagh in the autumn. The summer 2009 field school excavated Round House 2 on Slievemore Mountain under the direction of archaeologist Stuart Rathbone. Only the outside north wall, entrance way and inside of the Round House were completely excavated. From 2004 to 2006, the Achill Island Maritime Archaeology Project directed by Chuck Meide was sponsored by the College of William and Mary, the Institute of Maritime History, the Achill Folklife Centre (now the Achill Archaeology Centre), and the Lighthouse Archaeological Maritime Program (LAMP). This project focused on the documentation of archaeological resources related to Achill's rich maritime heritage. Maritime archaeologists recorded a 19th-century fishing station, an ice house, boat house ruins, a number of anchors which had been salvaged from the sea, 19th-century and more recent currach pens, a number of traditional vernacular watercraft including a possibly 100-year-old Achill yawl, and the remains of four historic shipwrecks. Other places of interest The cliffs of Croaghaun on the western end of the island are the third highest sea cliffs in Europe but are inaccessible by road. Near the westernmost point of Achill, Achill Head, is Keem Bay. Keel Beach is quite popular with tourists and some locals as a surfing location. South of Keem beach is Moytoge Head, which with its rounded appearance drops dramatically down to the ocean. An old British observation post, built during World War I to prevent the Germans from landing arms for the Irish Republican Army, is still standing on Moytoge. During the Second World War this post was rebuilt by the Irish Defence Forces as a lookout post for the Coast Watching Service wing of the Defence Forces. It operated from 1939