Category:Historic sites in the United States

The Category:Historic sites in the United States includes several subcategories. The largest subcategory, by far, is Category:National Register of Historic Places, which covers 80,000 separately listed sites. That subcategory includes numerous subsubcategories, such as Category:National Historic Landmarks in Alabama, Category:National Register of Historic Places in Alabama and similar for each of the U.S. states and territories.