Featuring Pollinating Native Perennials, Heirloom Tomatoes, Strawberry Plants, Culinary Herbs, 12″ Premium Hanging Baskets. Baked goods and prize drawings. Springside National Historic Landmark is a 20-acre designed landscape and historic site that was on the country estate of Matthew Vassar (d. 1868) and is the only landscape of Andrew Jackson Downing (d.1852) to survive largely intact. All proceeds directly support Springside’s restoration project. All proceeds directly support Springside's restoration work.