National Historic Landmark District
A National Historic Landmark District (NHLD) is a geographical area that has received recognition from the United States Government that the buildings, landscapes, cultural features and archaeological resources within it are of the highest significance and worthy of preservation.
Boston Post Road Historic District plaque
National Historic Landmark
A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500, or roughly three percent, of over 90,000 places listed on the country's National Register of Historic Places are recognized as National Historic Landmarks.
Independence National Historical Park in Philadelphia, one of the nation's most visited National Historic Landmark Districts
Navajo Nation Council Chamber, the seat of government for Navajo Nation in Window Rock, Arizona
The Titan Missile Museum in Tucson, Arizona, a National Historic Landmark
Central Park in New York City, a prominent National Historic Landmark; New York City has 116 NHLs, more than any other city in the U.S.