The photo from the small town in Kansas reminded me of Fort Larned NHS, which is no doubt one of the less visited sites in the National Parks system. It's a few miles west of Larned, Kansas, which is on US-56 well south of I-70, so unless travelers feel a need to get to Dodge City they're not likely to go anywhere near FOLS. I thoroughly enjoyed the time I spent there as an NPS employee updating the List of Classified Structures, but in all honesty don't know if I would ever have bothered to seek it out if I hadn't been getting paid to go count the buildings* to make sure they hadn't managed to misplace any.
Fort Larned was established 150 years ago, in 1869, to protect freight traffic, wagon trains, and the mail service along the Santa Fe Trail. (One of the fort's features is a piece of land that still has original trail ruts visible.) Troops stationed at the fort included the 10th Cavalry, the Buffalo Soldiers. This year's 150th anniversary celebration will include a Buffalo Soldier Cavalry Drill on Labor Day weekend as well as Buffalo Soldier living history programs on October 10. After the fort was decommissioned in the 1880s the site was privately owned for many years. Fort Larned NHS was established by an act of Congress in the 1960s. The Park Service has restored many of the buildings, and has a really nice little museum on-site. In addition to the museum that's part of the Visitor Center, they've restored a number of the buildings, including outfitting the interiors to look like what they would have back in 1870 when the fort was fully manned. As the above photo shows, when you look into the barracks there's bedding on the bunks, uniforms hanging on hooks, and so on, right down to oil cloth on the tables. The blacksmith shop has an interpreter doing living history (i.e., actual blacksmithing), and the setting overall really conveys a sense of what the fort was like 140 years ago.
Of course, part of the integrity of the site lies in the fact it's far enough outside the town of Larned, Kansas, to be safe from development. The viewshed is empty enough to help a visitor forget which century it is. Overall, the Fort is a great example of just how good the National Park Service can be at preserving historic sites.
It's also an interesting contrast with a state-managed site, Fort Hays State Park located in (of course) Fort Hays, Kansas. Fort Hays (pictured below) has, if I recall correctly, two buildings left. The park sits on the edge of town, it's next to a busy street, a golf course abuts it, and in general there isn't a whole lot there anymore that's especially evocative of the nineteenth century. Exhibits are pretty minimal, although the interpretive signage is good, and the overall integrity of the site is rather dismal. It's almost as much of a disappointment to a knowledgeable visitor as the park's buffalo "herd," which when I last saw it consisted of three animals.
I don't mean to suggest that state parks are always less well-done than NPS sites; I've seen some great examples of state historic parks over the years. It's just that in this specific case the difference between the two sites is particularly striking.
[*Seriously. My job involved making sure that what was listed in a database inventory of historic structures matched up with what was on the ground at the parks.]