Boston Common (also known as the Common) is a central public park in downtown Boston, Massachusetts. It is sometimes erroneously referred to as the Boston Commons. Dating from 1634, it is the oldest city park in the United States. The Boston Common consists of 50 acres (20 ha) of land bounded by Tremont Street (139 Tremont St. ), Park Street, Beacon Street, Charles Street, and Boylston Street. The Common is part of the Emerald Necklace of parks and parkways that extend from the Common south to Franklin Park in Jamaica Plain, Roxbury, and Dorchester. A visitors' center for all of Boston is located on the Tremont Street side of the park.