Flagstones is a late Neolithic interrupted ditch enclosure (similar to a causewayed enclosure) on the outskirts of Dorchester, Dorset, England. It derives its name from having been discovered beneath the site of the demolished Flagstones House. Half of it was excavated in the 1980s when the Dorchester by-pass was built; the rest of it still exists under the grounds of Max Gate, Thomas Hardy's house.