The National Park Service manages some of the most iconic locations in the world and cares for many of the nation’s most important historic sites. But they also curate an impressive collection of objects and resources, and many of them are publically available.
I find especially useful the Park Service’s “Electronic Resources” page. It includes links to thousands of documents, images, and other resources, much of it (though not all) public domain. I always enjoy browsing their extensive photo collection of parks and other National Park Service units, and I often find interesting texts and documents. If your looking to explore parks, the Park Service’s “Electronic Resources” page is a good place to start.
[Daily post 094 of 260 in my year-long challenge.] ♨