You can admire the foliage from bikes on a Rails-to-Trails Conservancy path (202/331-9696; railtrails.org)—part of a nationwide network of traffic-free routes on former train lines.
Sample 17th-century foods—and spellings!—at a dinner at the Plimoth Plantation living history museum (800/262-9356; plimoth.org; dinner for four $190), in Plymouth, Massachusetts.
Villas offer privacy, room to spread out, and value—the weekly fee almost always beats a hotel rate. Find your place in the sun on caribbeanway.com, wimco.com, and villascaribe.com.
Responsibletravel.com lets you find grassroots projects around the world that your family can take part in—such as helping construct a water system in a Mexican village.
Springtime on a farm means baby lambs and piglets. Search for places to make hay at agri-vacation Web sites such as mainefarmvacation.com, pafarmstay.com, and vtfarms.org.
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