All natural sites
Northeast — Natural site filings
Natural sites in Massachusetts
Massachusetts keeps 4 files on places that needed no walls — caves, forests, water and rock carrying legends older than any building the archive tracks. These dossiers draw on the oldest strata of the record: Indigenous tradition, settler folklore and reports that predate the filing system itself.
4 dossiers0 counties covered100% open to visitorsHockomock Swamp (Bridgewater Triangle) — deepest file
Also filed natural site:Hawaii14Puerto Rico8Guam7Maryland7North Carolina6Mississippi5California5Ohio4
Full Massachusetts record → state index· Every natural site filing → status shelf
Record last amended October 2, 2026 · shelves recounted with the archive