Rousay (ˈraʊziː, Rousee; Hrólfsey meaning Rolf's Island) is a small, hilly island about north of Mainland, the largest island in the Orkney Islands of Scotland. It has been nicknamed "Egypt of the north", due to its archaeological diversity and importance. Like its neighbours Egilsay and Wyre, it can be reached by ro-ro ferry from Tingwall. This service is operated by Orkney Ferries, and can take up to 95 passengers (reduced to 50 in winter), and 10 cars. The ferry links the islands of Rousay, Egilsay, and Wyre with each other, and with the mainland of Orkney. In the 2001 census, Rousay had a population of 212. Most employment is in farming, fishing or fish-farming; craft businesses and seasonal tourism-related work are present. It is separated from mainland Orkney by Eynhallow Sound. One road circles the island, about long, and most arable land lies in the few hundred yards between it and the coastline. With an area of , it is the fifth largest of the Orkney Islands. Among several freshwater lochs on the island, the biggest is Muckle Water. Rousay is a 'Site of Special Scientific Interest' with notable cliff formations and wildflower colonies, and has an RSPB bird reserve. The hilliest Orkney island after Hoy, it offers good views of neighbouring islands from Blotchnifiold , and Keirfea or Knitchen (both over ). Its wildlife includes seals and otters. Archaeological remains are present, especially a cluster of sites connected by a footpath near the western shore. Humans first made a Neolithic settlement at Rinyo. Other remnants include Bronze Age burnt mounds, Iron Age crannogs and brochs (the highest density anywhere in Scotland: three within of coastline), Viking boat burials, remains of a medieval church and a stately home at Trumland. Over 100 archaeological sites have been identified. Only a small fraction have been excavated and characterized. The most spectacular of the sites is the complex of Midhowe Broch and Midhowe Chambered Cairn. Blackhammer Chambered Cairn, Taversoe Tuick, and Knowe of Yarso chambered cairn are important tombs.