It's in Cave Junction,OR.
Not within its city limits, but Pipestone National Monument is just outside that city.
Mound City Group National Monument was created in 1923.
no its a national monument so must not be a city
Philadelphia
Colardo
Medford, Oregon is a good size city near Crater Lake National Park.
The nearest city is Visalia, California.
That would be Flagstaff, Arizona.
The Oklahoma City National Monument and Museum. The National Cowboy and Western Heritage Museum.
Fort McHenry National MONUMENT is within the city limits of Baltimore in the state of Maryland.
5. City of Rocks National Reserve (SE Idaho), Craters of the Moon National Monument (SE Idaho), Hagerman Fossil Beds National Monument (SC Idaho), Minidoka Internment National Monument (SC Idaho), and Nez Perce National Historical Park (N Idaho).
City of Caves was created in 2004.