{"nrhp_refnum":"100008539","name":"New City of Mentalphysics Historic District","other_names":["Institute of Mentalphysics","Joshua Tree Retreat Center"],"category":"district","location":{"address":"59700 Twentyninepalms Hwy.","address_restricted":false,"city":"Joshua Tree","county":"San Bernardino County","state":"CA","lat":34.138093000000055,"lon":-116.36207156594199,"geom_source":"nps_gis"},"listed_date":"2023-01-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Community Planning and Development","Social History","Religion"],"significance_levels":["local"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/california/san-bernardino-county/new-city-of-mentalphysics-historic-district-100008539/"}