List of National Historic Landmarks in South Dakota
The List of National Historic Landmarks in South Dakota contains the landmarks designated by the U.S. Federal Government for the U.S. state of South Dakota. There are 16 National Historic Landmarks (NHLs) in South Dakota, one of which is shared with Iowa and listed by the National Park Service as primarily in that state.
Source: Wikipedia — List of National Historic Landmarks in South Dakota (CC BY-SA 4.0)