Eastpoint Mall, one of the Baltimore area’s first shopping centers and a cultural landmark in Dundalk, opened in 1956. On Aug. 31, it will close for good. Tenants said they learned only recently about the closure of the 857,366-square-foot regional mall on Eastern Avenue. On a recent afternoon, the mall was nearly deserted, with just a handful of stores and a few chains as anchors, including JCPenney, Lids and Foot Locker. The food court had four vendors left, with a few people milling about.