{"nrhp_refnum":"85003432","name":"Anza Borrego-Sin Nombre, S-4","other_names":["S-4"],"category":"site","location":{"address":null,"address_restricted":true,"city":"Borrego Springs","county":"San Diego County","state":"CA","lat":null,"lon":null,"geom_source":null},"listed_date":"1985-10-25","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Prehistoric","Art"],"significance_levels":["national"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123857754","wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/california/san-diego-county/anza-borrego-sin-nombre-s-4-85003432/"}