Lyonesse

The Isles of Scilly were formerly one island and many archaeological sites now lie beneath the sea. Excavations have only been possible at the lowest tides and there are certain to be more sites permanently under water (there are more than 500 sites above the high water line). Normally submerged sites that have been excavated include: 10 hut circles, 7 cists and graves, 4 field wall enclosures and 12 other occupational sites and partial exposures in eroding cliffs. See marine contour map.