Necropolis

A necropolis (plural: necropolises or necropoleis) is a large cemetery or burial place (from Greek nekropolis "city of the dead"). Apart from the occasional application of the word to modern cemeteries outside large towns, the term is chiefly used of burial grounds, often an abandoned city or town, near the sites of the centers of ancient civilizations.

Grave field is a term for prehistoric burial grounds that do not include any above-ground structures or markers. These include row graves, urnfields, tumuli, etc.