Coming programs will include a family walk in Inwood Park in Manhattan , on July 23 , from 3 to 5 p.m. ; a guided tour along the esplanade in Battery Park City and the area surrounding ground zero , on July 24 , from 10 a.m. to noon ; and a walking tour in Brooklyn Heights , on July 31 , from 10:30 a.m. to 12:30 p.m . The fee for tours is $ 11 ; students and those 65 and older , $ 9 .