The Los Angeles County Arboretum and Botanic Garden, 127 acres, is an arboretum, botanical garden, and historical site nestled into hills near the San Gabriel Mountains. It is open daily during business hours, for a fee. The Arboretum is located across the street from the Santa Anita Park, the horse racetrack, and the shopping mall Santa Anita Fashion Park, now known as Westfield Santa Anita