You don't have to possess a green thumb to appreciate an afternoon at this wonderful botanical facility, formerly known as the Quail Botanical Gardens. Boasting the country's largest bamboo collection, plus more than 35 acres of California natives, exotic tropicals, palms, cacti, Mediterranean, Australian, and other unusual collections, this serene compound is crisscrossed with scenic walkways and trails. There's also a Children's Garden, featuring a treehouse built into a 20-foot, climbable tree. Guided tours are given Saturdays at 10:30am, and there's a gift shop and nursery; a variety of special events and classes (including bird-watching, children's activities, and floral design) are scheduled throughout the year. The gardens are free to everyone on the first Tuesday of the month.