Lonely Planet review for Westness Walk
The south shore of Rousay from Midhowe Tomb to Westness Farm has been described as the richest archaeological mile in Britain, recording 5000 years of Orkney history. Here you can see the remains of human habitation ranging from the neolithic through the Iron Age to Viking and Pictish burial sites, medieval farms and the 12th-century St Mary's Church.
The coast here is a good place for watching seals and otters, looking out across the turbulent tidal waters of Eynhallow Sound to the Broch of Gurness. The little island of Eynhallow, now uninhabited, was once a sacred place, and houses the ruins of an early Celtic chapel (the name is Old Norse for 'holy island').
Tourist offices on Mainland can provide a Westness Walk leaflet detailing this mile-long hike.