Hot Springs, SD
The National Trust for Historic Preservation has named a century-old hospital in Hot Springs for war veterans as one of America's 11 most endangered historic places.
Battle Mountain opened in 1907 to treat Civil War veterans with lung or respiratory problems. The National Park Service says the Black Hills site was the first sanitarium to provide short-term treatment to veterans.
Battle Mountain reportedly used water from the fabled springs nearby to treat residents.
The sanitarium is currently in use as part of the Department of Veterans Affairs Black Hills Health Care System's Hot Springs campus. The VA is planning to abandon the building and open an outpatient clinic.