Lyman Estate Greenhouses, Waltham, MA. Hundreds of orchid plants are for sale, including many hard-to-find varieties. Visit these antique greenhouses and enjoy gorgeous floral colors, shapes, and scents. Among the many varieties on display and for sale will be Cattleyas, Laelias, Oncidiums, Paphiopedilum, and Phalaenopsis. Free admission. For information call 781-891-4882, ext. 244.