Harundale Mall, the first enclosed shopping mall on the East Coast in the 20th century, was located in Glen Burnie, Maryland, United States at the intersection of Ritchie Highway and Aquahart Road. Harundale Mall has been replaced by Harundale Plaza. The mall was built in Anne Arundel County by James Rouse who later developed Columbia, Maryland, one of the first modern planned communities, in Howard County.