Visitors to the Monmouth County Park System's Historic Walnford, Upper Freehold Township, can experience the ups and downs, rumble and shake of the park's 19th century gristmill on weekends through Nov. 26. During these free demonstrations, visitors will see how corn was processed in the late 1800s.

Open year-round, hours at Walnford are 8 a.m. to 4:30 p.m. Admission and parking are free. For more information, call (609) 259-6275. For persons with hearing impairment, the TTY/TDD number is 711.