The Mary Jo Wegner Arboretum and East Sioux Falls Historic Site is a 145-acre natural haven located east of Sioux Falls. Its mission: to nurture connections between plants and people, past and present, in an inspiring natural setting that invites discovery. Wander through the Mabel and Judy Jasper Educational Center and check out our historical classroom. Log on to our website for hours, events and to download a map of our walking trails. The park is open daily year-round.