Educational Travel on a Shoestring shows parents how they can help their children learn–and have a blast–while traveling. From researching destinations to sharing activities that both teach and entertain, this priceless guide offers practical information for parents who want to have more fun with their kids, build closer family ties, and enjoy richer educational experiences–all without spending a fortune.

Now in its fourth edition, the National Geographic Field Guide to the Birds of North America is the ultimate birder’s field guide. Sturdy, portable, and easy-to-use, it features the most complete information available on every bird species known to North America. This revised edition features 250 completely updated range maps, new plumage and species classification information, specially commissioned full-color illustrations, and a superb new index that allows birders in the field to quickly identify a species.

The National Geographic Field Guide to the Birds of North America, Fourth Edition will continue to be a bestseller among the fastest-growing sector in the U.S. travel market—the nearly 25 million people who travel each year specifically to observe wild birds.

The Pony Express National Historic Trail was used by young men on fast paced horses to carry the nation's mail across the country, from St. Joseph, Missouri to Sacramento, California, in the unprecedented time of only ten days. Organized by private entrepreneurs, the horse-and-rider relay system became the nation's most direct and practical means of east-west communications before the telegraph. Though only in operation for 18 months, between April 1860 and October 1861, the trail proved the feasibility of a central overland transportation route, and played a vital role in aligning California with the Union in the years just before the Civil War. Most of the original trail has been obliterated either by time or human activities. Along many segments, the trail's actual route and exact length are matters of conjecture. However, approximately 120 historic sites may eventually be available to the public, including 50 existing Pony Express stations or station ruins.

From the sagebrush at its alluvial base to the 13,063-foot summit of Wheeler Peak, Great Basin National Park includes streams, lakes, alpine plants, abundant wildlife, a variety of forest types including groves of ancient bristlecone pines, and numerous limestone caverns, including beautiful Lehman Caves.

Lake Mead National Recreation Area (NRA) offers a wealth of things to do and places to go year-round. Its huge lakes cater to boaters, swimmers, sunbathers, and fishermen while its desert rewards hikers, wildlife photographers, and roadside sightseers. Three of America's four desert ecosystems--the Mojave, the Great Basin, and the Sonoran Deserts--meet in Lake Mead NRA. As a result, this seemingly barren area contains a surprising variety of plants and animals, some of which may be found nowhere else in the world.

The California Trail carried over 250,000 gold-seekers and farmers to the gold fields and rich farmlands of California during the 1840's and 1850's, the greatest mass migration in American history. Today, more than 1,000 miles of trail ruts and traces can still be seen in the vast undeveloped lands between Casper Wyoming and the West Coast, reminders of the sacrifices, struggles, and triumphs of early American travelers and settlers. More than 240 historic sites along the trail will eventually be available for public use and interpretation. The trail passes through the states of Missouri, Kansas, Nebraska, Colorado, Wyoming, Idaho, Utah, Nevada, Oregon, and California.

Santa Fe emerged as the hub of the overland continental trade network linking Mexico and United States markets—a network that included not only the Old Spanish Trail, but also the Santa Fe Trail and El Camino Real de Tierra Adentro. After the United States took control of the Southwest in 1848 other routes to California emerged, and use of the Old Spanish Trail sharply declined. Because of its rich history and national significance, the Old Spanish Trail has been designated as a national historic trail.