The Willows Mansion Holiday Open House is back! Join Willows Park Preserve at the Mansion for a festive open house featuring gift vendors, craft tables for children, hot chocolate, holiday music & snacks, poinsettia sale, and more! This event is FREE and open to the public. Located at the historic Willows Mansion, 490 Darby-Paoli Road, Villanova PA. Interested in a calmer, more exclusive social event with early access to the vendors? Consider coming to our Holiday Open House Preview Party the night before.