{"nrhp_refnum":"14000184","name":"Happy Hollow Recreation Center","other_names":["Happy Hollow Playground","Quarry House Playground"],"category":"building","location":{"address":"4740 Wayne Ave.","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":40.02438493000005,"lon":-75.16591170199996,"geom_source":"nps_gis"},"listed_date":"2014-04-28","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Entertainment/Recreation"],"significance_levels":["local"],"summary":null,"photo":null,"district":{"nrhp_refnum":"66000678","name":"Colonial Germantown Historic District","url":"https://nationalhistoricalregister.com/districts/pennsylvania/colonial-germantown-historic-district-66000678/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/happy-hollow-recreation-center-14000184/"}