Historic site or heritage site is an official location where pieces of political, military, cultural, or social history have been preserved due to their cultural heritage value. Historic sites are usually protected by law, and many have been recognized with the official national historic site status. A historic site may be any building, landscape, site or structure that is of local, regional, or national significance. Usually this also means the site must be at last 50 years or older.
Historic sites and heritage sites are often maintained for members of the public to be able to visit. Visitors may come out of a sense of nostalgia for bygone eras, out of wishing to learn about their cultural heritage, or general interest in learning about the historical context of the site. Many sites offer guided tours for visitors, conducted by site staff who have been trained to offer an interpretation of life at the time the site represents. A site may also have a visitor center with more modern architecture and facilities, which serves as a gateway between the outside world and the historic site, and allows visitors to learn some of the historical aspects of the site without excessively exposing locations that may require delicate treatment. To aid potential visitors find historic sites, or because they can serve as landmarks, they're often marked on maps, for example with the historic site symbol