Tour the UW's Center for Urban Horticulture. This free tour lasts one hour and takes place the first Thursday of every month. The center is a 16 acre landscaped site with a library, gardens, a farm, a 74-acre nature area and university labs and greenhouses. A knowledgeable guide will show you around and highlight different parts of the center. You don't need to register, just be at the Soest Garden by 1:30pm.