• Picnic by the Water: Head for the harbor or river, relax on a park bench or patch of grass, turn off your phone, and enjoy the spectacular scene. Whether it's sailboats or ocean liners, sea gulls or scullers, there's always something worth watching. My favorite spot is Sargent's Wharf, on the edge of the North End, but it's just one of thousands of pleasant spots.
  • Ride on a Swan: A Swan Boat, that is. The engagingly low-tech vessels ply the waters of the Public Garden lagoon at a stately pace, allowing an up-close view of the barely wild wildlife that flourishes in the heart of the city. The cost for a family of four runs about $10; children under age 2 ride free.
  • Take a Ranger-Led Tour: The National Park Service is such a good use of tax money. Free and cheap tours of historic attractions all over eastern Massachusetts elevate a visit to a park, a house, a neighborhood, or even a government installation (the Charlestown Navy Yard) from good to great.
  • Relish a Vicarious Thrill: Without so much as lacing up a sneaker, you can participate in the world-famous Boston Marathon. Stretch a little. Drink plenty of fluids. Claim a piece of sidewalk with a front-row view of the course. Cheer as the runners thunder past. Then put your feet up -- you must be exhausted.
  • Prowl Newbury Street: From the genteel Arlington Street end to the cutting-edge Massachusetts Avenue end, Boston's legendary shopping destination is 8 blocks of pure temptation: galleries, boutiques, jewelry and gift shops, and more. Fortunately, window-shopping is free.
  • Check out a College Concert or Show: Countless student groups just want an attentive audience, and the free or minimal admission can pay off in the long run. Imagine the credit card commercial: "Ability to say you recognized the talent of [insert name of big star] in a student production? Priceless."

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.