Civil Air Patrol cadets fold the American flag at the 2013 Dundalk Heritage Fair in Maryland. The annual, summer holiday time, Heritage Fair is a World Class Venue for outdoor concerts; it also has - all day for 3 days - great: fun, food, crafts shopping, community and local history booths, some carnival rides and games, and more. Go early and stay late, in tree shaded and grass carpeted Dundalk Heritage Park.