Saved 10/22/2020

Heritage Documentation Programs administers the Historic American Buildings Survey (HABS), the Federal Government's oldest preservation program, and its companion programs: the Historic American Engineering Record (HAER) and Historic American Landscapes Survey (HALS). Documentation produced through the programs constitutes the nation's largest archive of historic architectural, engineering, and landscape documentation. The HABS/HAER/HALS Collection is housed at the Library of Congress.

Saved 10/22/2020

The American Society of Landscape Architects collaborates with the NPS on the Historic American Landscapes Survey. The final documents are searchable and available thru the Library of Congress but this link is interesting for the visual map of documented locations featured at the bottom of the page.