Herculaneum is a settlement in Italy, Roman town destroyed by eruption of Mount Vesuvius. Pyramason catalogues it as PYR-089984 at 40.80611, 14.34750 (40°48'22.0"N 14°20'51.0"E).
Recorded heritage designations: part of UNESCO World Heritage Site.
There are 17 other catalogued sites within 5 km of it, 438 within 25 km and 623 within 50 km. That density is itself the finding: this is not an isolated monument but part of a worked landscape.