{"nrhp_refnum":"03000718","name":"Letchworth State Park","other_names":["Glen Iris","Letchworth Park"],"category":"district","location":{"address":"Genesee River Gorge Bet. Portageville and Mt. Morris","address_restricted":false,"city":"Genesse Falls","county":"Wyoming County","state":"NY","lat":42.58587170100003,"lon":-78.04248173199994,"geom_source":"nps_gis"},"listed_date":"2005-11-04","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Architecture","Art","Conservation","Historic - Aboriginal","Engineering","Entertainment/Recreation","Exploration/Settlement","Landscape Architecture","Military"],"significance_levels":["national","state","local"],"summary":{"what_it_is":"Letchworth State Park is a 14,345-acre historic district along a 22-mile stretch of the Genesee River gorge between Portageville and Mt. Morris in Wyoming and Livingston Counties, New York. It contains 338 contributing resources, including buildings, sites, structures and objects.","why_significant":"The nomination presents the park as rich in natural, archaeological, Native American, early settlement, transportation and recreational resources. It is tied to the William Pryor Letchworth estate and to two eras of park development under the American Scenic and Historic Preservation Society and the New York State Council of Parks. The form recommends significance at the national and statewide levels.","narrative":"Letchworth State Park occupies about 14,345 acres along a 22-mile section of the Genesee River between Portageville and Mt. Morris, a gorge often called the \"Grand Canyon of the East.\" The river has cut narrow, winding bedrock canyons at both ends, with three major waterfalls in the upper canyon and a flood-control dam at the Mt. Morris end. Most developed land and most historic buildings lie on the west side of the river, near the falls. The district includes natural features, archaeological sites, industrial and railroad remains, canal-related resources, designed landscapes and recreational facilities. It also holds features of the William Pryor Letchworth estate. Letchworth gave his land to the State of New York and the American Scenic and Historic Preservation Society after a hydro-electric dam was proposed that threatened the falls. Two eras of park development followed, under that society and later the New York State Council of Parks. Over one million people visit each year.","period_of_significance":null,"architect_builder":null,"architectural_style":"Mid-19th Century Greek Revival and Exotic Revival; Late Victorian Italianate; Colonial Revival; Bungalow/Craftsman; Naturalistic","criteria":[],"status_note":"Operates as a state park; the form states it draws over one million visitors each year.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.628666-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/03000718.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/03000718/689c6472a5-800.webp","url_1600":"https://nationalhistoricalregister.com/media/03000718/689c6472a5-1600.webp","licence":"CC BY-SA 3.0","author":"Suandsoe","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Lower_Falls_at_Letchworth_State_Park,_New_York,_USA.jpg\" rel=\"noopener\">Suandsoe</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Lower_Falls_at_Letchworth_State_Park,_New_York,_USA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75323344","wikipedia":"https://en.wikipedia.org/wiki/Letchworth_State_Park","wikidata":"https://www.wikidata.org/wiki/Q1303662"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/wyoming-county/letchworth-state-park-03000718/"}