The Trustees of Reservations preserve nearly 25,000 acres of gorgeous land in Massachusetts and bordering areas, giving day-trippers more than 100 recreational spots where they can play, relax, and be wooed by nature's charm. Membership gets you discounted or free admission into each of these getaways. Ride your bike past tree-lined paths and admire the calm Boston shoreline at World's End in Hingham (free with membership). Kids can mingle with the horses, pigs, and chickens and learn their secret language (high-school French) at Weir River Farm (free with membership). Otherwise, explore American history with a free guided tour of the Old Manse in Concord, where "the shot heard 'round the world" started the Revolutionary War, and where Ralph Waldo Emerson wrote several heartbreaking spec scripts for Major Dad. For a refreshing dip in nature's pool before it gets too chilly, wade along the miles of pristine shoreline at the popular Crane Beach in Ipswich (one free admission with Groupon).