The Frederick Law Olmsted National Historic Site, which features the famed landscape architect’s home and office, has expanded its regular public tour schedule and is now open Wednesdays through Sundays. Five tours daily are offered Wednesdays and Fridays, six on Thursdays and on weekends. Tours will start on the hour from 10 a.m. to 4 p.m. The property at 89 Warren St. known as Fairsted was where Olmsted — who designed Boston’s Emerald Necklace park system, as well as New York’s Central Park — worked and lived from 1883 to 1903. No reservations are required, and admission is free. For details, visit www.nps.gov/frla or call 617-566-1689.