Join the Waltham Land Trust Wednesday morning for a brisk walk around Waltham Common while learning about its monuments. The walk is part of a Health Fair occuring in the parking lot of the Joseph M. Smith Community Health Center between 9-noon. Walkers will leave from WLT's table in the parking lot at 10:30 and will follow the "Waltham Common Route" in the Waltham City Walks brochure produced by the Waltham Land Trust, Healthy Waltham, and the JMSCHC last fall. Participants can test their cholestoral, blood pressure, and glucose count before and after exercise, pick up WLT trail guides, and learn about eating healthy while at the Fair.