After visiting all 59 U.S. National Parks, we decided to expand our goal to include every site the NPS protects, including national monuments, seashores, lakeshores, historic sites, historical parks, battlefields and more.
The naming system of the NPS usually indicates how the land can be used or what it protects; some parks, like Denali and Katmai, include within their boundaries preserves, where people can hunt and fish. In the case of these preserves, the park counts as two separate sections.
Not every national monument, historic site, etc. is administered by the NPS—some are run by Fish and Game or by the BLM—so those are not included on this list, though we will certainly try to visit them whenever we can!