Of the 59 sites with a national parks designation in the United States, the oddest of the bunch has to be Hot Springs National Park.
Hot Springs isn’t a park in any real sense of the word. Not only is it the smallest national park by area, the biggest attraction has nothing to do with nature or wildlife. They are the bathhouses which were built in the late 19th and early 20th century.
The fact that Hot Springs is considered a national park, as opposed to a national monument, is due to an act of congress in 1922 which changed the status from a reservation to a park. While the park does have about 5,000 acres of forested land and lakes which are part of it, it is really almost secondary to why the location was included as a national park. Most of the land is within the city of Hot Springs, making it the most urban of all the national parks as well.
Visiting Hot Springs is not difficult. The city of Hot Springs has a population of 35,000 and is about an hour drive from the capital of Little Rock. There are over a dozen spas and bathhouses where you can enjoy the hot water of the hot springs. The visitor center has preserved the look and feel of the bathhouses from the early 20th century.