Hundreds of photographs illustrate the development of the site from a resort hotel to a regional history museum, the transportation of large artifacts and historic structures to the museum grounds, special events, and distinguished visitors.
Deeds record the various restrictions on the dozens of parcels that make up the current museum grounds. The archives also include: 50 years of guest and visitor registries; board of trustee proceedings and transcriptions; and financial and human resource related documentation.
The internal archives are open to the public by appointment with the Director of the Library. Images from the archives have often been used in articles, as well as for press releases, especially during the Adirondack Museum's 50th Anniversary year in 2007. Images showing the transport of historic structures and large artifacts to the museum grounds have been used in publications, lectures and exhibits.