Downtown Winnipeg's Exchange District is named after the area's original grain exchange, which operated from 1880 to 1913. The 30-block district received National Historic Site of Canada status in 1997; it includes North America's most extensive collection of early 20th-century terracotta and cut stone architecture, 62 of downtown Winnipeg's 86 heritage structures, Stephen Juba Park, and Old Market Square. Other major downtown areas are The Forks, Central Park, Broadway-Assiniboine and Chinatown. Many of Downtown Winnipeg's major buildings are linked with the Winnipeg Walkway.