The geological and spiritual history of Lake Powell and the Glen Canyon region of Utah and Arizona.
The pueblos of Sierra Madre, Mexico; a donkey-powered pinole grinder made of stone; a leather goods shop in Sahuaripa, Mexico.
Utah's San Rafael Swell and Little Grand Canyon.
Hiking through Canyon X and Kodachrome Basin State Park in Utah; Goblin Valley State Park.
The Northern Jaguar Project tracks jaguar movements throughout Eastern Sonora, Mexico.
Tiger rattlesnakes; rattlesnake dens in the mountains; gila monster.
Kartchner Caverns State Park; Tombstone, Ariz.; Sandhill Cranes of Sulphur Springs Valley; Chiricahua Mountains.
Hot-air balloon ride in Yuma, Ariz.; Arizona Territorial Prison; Sonoran Desert National Monument; Picacho Peak State Park.
Pinaleno Mountains; Organ Pipe Cactus National Monument; Quitobaquito Springs; border fences between the U.S. and Mexico.
Cemetery in Hachita, N.M.; Geronimo Surrenders Monument; Gadsden Hotel; a trip 300-feet underground on Bisbee's Queen Mine Tour.
Cuerva de los Manos: stenciled handprints; Cerro de los Indios; little ranches; modern sheep-herding gauchos.
The Patagonian landscape; El Calafate, the gateway to Los Glaciares National Park; an ice cave; glacial calving.
Tracing the Rio San Miguel through Sonora, Mexico; Father Kino's monument; Cucurpe.
A restoration crew at San Xavier del Bac Mission uses new adobe to repair existing exterior; a commercial brickyard; the Tucson Mountains.
Indigenous peoples of Chihuahua, Mexico; evidence of advanced drainage systems in Paquime, Mexico; a Mennonite farm operation.
The life of the hummingbird, from the Sonoran Desert to Ecuador's mountaintop preserve of Loma Alta; howler monkeys.
Loma Alta, Ecuador, sits below a cloud-forest nature preserve; a hummingbird oasis.
The witches market in Chiclayo offers herbs, hallucinogens and other natural remedies; Ventanillas de Otuzco.
California's Coachella Valley is the hottest inhabited place in the Northern Hemisphere; Palm Canyon; Oasis Date Gardens.
The rugged coast, habitats and traditions of Michoacan, Mexico; banana plantation; Sandbox Tree bears explosive fruit; Mala Mujer shrub.
Annual festival dedicated to pitaya cactus fruit; workers harvest pitayas by lamplight; carpenter makes furniture from columnar cactus wood.
The history and production process of tequila in Jalisco, Mexico.
Exploring the 'Arizona Strip' for evidence of early settlements; high desert plants; California Condor Restoration Project.
The market at Puerto Ayora in Santa Cruz; Darwin Research Station's saddle back tortoises; land iguanas; volcanic craters.
Evidence of drought, fire, and civilization; a hike through Organ Pipe Cactus National Monument.
Scientists use tree rings from the White Mountains of California and Sequoia National Park to determine how long the Medieval drought lasted.
South American hats; a museum houses the ancestors of the Chachapoyas; Kuelap's active archeological site.
Adobe pyramids tower over the Peruvian countryside; the Royal Tombs of Sipan house some of the world's richest gold artifacts.
The Rio Maranon in the Amazon boasts a growing abundance of desert vegetation; a gushing spring powers woodworking machinery.
A hunt for fish fossils in the Red Desert of Wyoming; Painted Desert; meteorite collector Robert Haag.
The second half of the deserts along Route 66, from the Petrified Forest to the Joshua trees of the Mojave Desert.
Historic Route 66 allows thousands of Americans to make the journey to California.
Scientists mark and track desert tortoises using telemetry; homes benefit from the Arizona-Sonora Desert Museum's Tortoise Adoption Program.
The Gondwana Link project is an ecological restoration process geared toward repairing habitats fractured after World War II.
Alice Springs Desert Park's rivers, sand country and woodlands habitats are home to kangaroos, wallabies and bilbies.
Prime bird-watching sites in Australia; helicopter excursion.
Quartzsite, Ariz., is located 20 miles east of the Colorado River.
Baja's wine industry.
A pilgrimage by foot and horseback to the church in Sonora's Magdalena de Kino pays homage to San Francisco.
The geology of the Grand Canyon and its desert vegetation.
Sacred salt mines; the intersection of the Little Colorado River with the main river; canyon concert.
Once home to prehistoric Sinagua Indians, Montezuma Castle now houses a colony of bats.
The Rio Sonora in northwest Mexico stretches to the Gulf of California near Kino Bay.
Marine iguanas and the flightless cormorant are some of the creatures in the waters off the Galapagos Islands.
Searching for large cacti on a desert island; flamingos; ghost crabs.
The volcanic origins of the islands of Ecuador.
Exploring plazas from pre-Hispanic to modern and how they were used by people in the New World.
The Red Desert has the largest desert elk herd and largest migratory game herd in the continental United States.
The Red Desert of southwest Wyoming and the Honeycomb Buttes.
Journey along the El Camino Real; monument to Mexican soldier Pancho Villa; Chamizal National Memorial.
A journey along El Camino Real; history of the springs of Aguas Calientes; mining town.
El Camino Real trade route from southern Mexico to New Mexico.
The Tohono O'odham live on the second-largest reservation in the U.S.
A trip down the Green River in Utah includes a look at the Dinosaur National Monument and Desolation Canyon.
Peru's Colca Canyon; Andean condors; terraced farming; fruit of the sancyo cactus; harvest; quinoa.
Incan culture; rock art; Nazca lines; underground canals; aqueducts; Incan burial ground.
Sand dunes; the Imperial Sand Dunes National Recreation Area; Mexico's Gran Desierto Dunes; Utah's Coral Pink Sand Dunes State Park.
Sand dunes in Colorado's Rocky Mountains, the base of the Guadalupe Mountains in west Texas and the White Sands National Monument in New Mexico.
The traditions of the Apatas, an aboriginal group in Sonora, Mexico, including palm-weaving.
Collecting plants; Scottsdale, Ariz.; Boyce Thompson Arboretum; Bach's Cactus Nursery in Tucson, Ariz.; cactus cultivation.
La Paz, Bolivia; Witches' Market; Lake Titicaca; Incan temple.
The Pan-American Highway; Lima, Peru; Ballestas Islands; Toro Muerto.
Wild plants of Baja, Calif., including the boojum tree and the bonsai-like coastal alkali heath shrub.
Cochimi Indian cave drawings; the Sierra del San Francico Mountains; elephant trees; gypsum crystals.
Lava flows and rodent population in Baja California.
Birdwatchers from the Arizona Sonora Desert Museum travel through coastal and forest habitats searching for rare birds.
Astronomy in the Puebloan world, as seen through rock art and architecture throughout the Four Corners.
The Valle de Tehuacan is not only home to the world's greatest variety of cacti, but possibly the birthplace of domestic corn.
Exploring the Spanish influence in the valley of Tehuacan and Oaxaca.
Eighteen species of cacti grow in the Valle de Tehuacan and nearby Oaxaca, all used by native peoples.
The Gila River, which formerly flowed across Arizona, is used up and dries out merely halfway to its former confluence with the Colorado River.
The ecosystems of southwestern Bolivia's desert and volcano regions.
Life in the foothills of the Bolivian Andes, in the village of Santiago de K, includes harvesting endemic potatoes and quinoa.
Exploring the highest desert in the world, located in southwestern Bolivia.
Gray whales travel thousands of miles to reproduce at San Ignacio lagoon of Baja California.
The Basque people of the Great Basin Desert; Winnemucca Basque Parade and Festival; Basque traditions.
A look at the plants and animals that inhabit the Great Basin and the surrounding area.
Nevada; Highway 50; Great Basin Desert; steam train; Ruby National Wildlife Refuge; Canada geese; cranes.
Mojave Desert; lilies; lizards; Joshua Tree National Park; cholla forest.
Mojave Desert; Mojave National Preserve; creosote flats; Mitchell Caverns; volcanic fields.
Travels to such aptly named places as the Devil's Golf Course, Furnace Creek and Badwater.
Sasabe, Ariz.; mission; spring wildflower display; petroglyphs.
Sonoran Desert; Organ Pipe Cactus National Monument; dry cave; javelina; medicinal plants.
Chihuahau Desert; biking, hiking and canoeing through Big Bend National Park; prehistoric fossils; cave paintings; canyons.
Host John David Yetman visits the Big Bend National Park to explore the Chihuahuan Desert near the Rio Grand river.
The people of Argentina; natural resources; Buenos Aires; Eva Peron's tomb; wool harvest; cactus wood.
Salta, Argentina; market; fog forest; painted desert.
Argentina; Buenos Aires; the Andes; farmers market; rain forest; archaeological site predates the Incas.
Sandhill cranes; fish; antelopes.
Survival strategies of desert mammals, reptiles, amphibians, birds, insects and plants.
Traveling through the desert without air conditioning in a Model T Ford, on horseback and on foot.
Prickly pear uses.
Arizona-Sonora Desert Museum; education.
Home construction; building techniques; Phoenix.
Mexican town prospers after Juan Quezada shares his pot-making skills.
Ancient life along the San Juan River.
Ranchers; biologist Peter Warren; ecosystems.
Baja California; mangroves; fisheries; tuna farm.
Geology class; earthquake; hot springs; lava tube; bats; colonial town.
Salton Sea; birds; wildlife refuge.
Mesquite tree; bug; artifacts; museum.
Guarijio Tribe; ethnobotanist David Yetman.
Rafting; Colorado River; Grand Canyon; engineer Robert Brewster Stanton.
Anniversary celebration; clips from previous seasons; future.
The lives of bees, from honey production to the rigid caste system.
Deadly honeybees have migrated north to the Southwestern United States.
Forest-fire fighter; outdoors journalist; artist; museum curator.
Jobs that entail working outdoors, including eco-wrangler, river guide, hot-air balloonist and archaeologist.
Fluoroscopy reveals the insides of desert insects, reptiles, birds, mammals.
Archaeologists examine the ancient Chaco culture of New Mexico.
Spiders and their engineering prowess: webs.
Mexican residents create a marine nature preserve.
Carl Lumholtz explores the desert of Sonora, Mexico.
Scientific, medical and culinary uses for chiles, from analgesic rubs to keeping away unwanted animals.
Reintroduction of antelopes, beavers and ferrets to natural environments.
Roads impact the environment.
Rare, strange and mutated plants.
Gems and minerals.
Butterflies; moths; dragonflies.
A desert museum; creating exhibits; natural habitats.
Biologist protects birds.
The relationship between humans and rattlesnakes.
Seven biomes of the Sonoran Desert.
Fungi; tadpoles; lizards; ponderosa pine.
The agave is a source of tequila, food, clothing, rope.
Impact of nonnative plant and animal species.
Varied zones within the Santa Catalinas.
Four insects: a grasshopper, fly, beetle and moth.
Nontraditional building methods; building in an arid environment.
Studies of bird migration.
Night at the Arizona-Sonora Desert Museum.
Traditional farming methods; irrigation.
Myths about desert plants and animals.
Several factors cause a decline in wild pollinators.
Islands of the Baja; sea lions; elephant seals; gray whales; eco-tourism.
Islands of the Baja; sea lions; elephant seals; gray whales; eco-tourism.
The natural cycle of life; life/death in the Sonoran desert.
Fort Huachuca, U.S. Army post; civilian researchers.
Southwestern Research Station; hummingbirds; lizard push-ups; tarantulas.
The important relationship of plants and animals.
Sonoran desert water holes.
Climate changes; learning about past climates; tree-ring analysis; fossil dung; dinosaur bones.
Taking advantage of the coolness of night, desert animals roam, gather and hunt.
Animals cope with the harsh desert landscape; animal survival strategies.
Glen Canyon Environmental Studies; measuring changes in river environments; the future of rivers.
Natural history of the Colorado River.
The role of fires in the desert; future fire-management techniques.
Plants of the Sonora.
Animals of the Sonora.
Procreation of desert animals.
How animals are cared for at the Arizona-Sonora Desert Museum.
Researching desert life.
A group of children surveys a riparian area.
The inquisitiveness of children.
The impact of the Verde River on humans.
Mayo Indian uses for plants.
The role of bats in the desert ecosystem.
Desert animals; scientific research on desert life.
Site preservation; desert protection efforts; fishing industry.
The Tohono O'Odham manage and protect endangered plants.
Plants that attract birds; a Tohono O'Odham garden.
Research project studies hummingbirds.
Animals and plants use poisons for protection.
Scientific research on desert life.
Small desert life; aquatic insect determines water quality.
Plants and animals of desert sand dunes.
The saguaro cactus.
Baja California: ecotourism, sea birds, whale-watching.
Construction of a grassland habitat.
Insects and arthropods.
Biologists restore desert areas to their original condition.
The plant and animal life found in Arizona's Chiricahua Mountains.
Benefits of studying the desert.
Birds, plants and animals survive in harsh conditions.
The Sea of Cortez supports marine and land creatures.
The Colorado River sustains fish, plants and wildlife.
Spring flora and fauna.
Humans affect the desert environment.
Land south of the Arizona/Sonoran border.
Water's path to the desert.
Geological formations create a desert.
The variety of plants and animals that live in the Sonoran desert.
Prickly pear, saguaros and other edibles.
Wolves, vultures, coyotes, kestrels.
Strangers affect indigenous creatures.
Caves and mines.
Creatures adapt to harsh desert conditions.
Mobility of desert animals and plants.
Sonoran monsoons; creatures of the night, including bats, owls and scorpions.
Wolves, pupfish, rattlesnakes, chuckwallas.
Desert creatures aid research scientists.
Canada; 'mountain islands.'
Identifying dangerous and poisonous desert plants and animals.
Wildflowers, spadefoot toads, cacti, ocotillo and other desert wildlife.
This 13-part series examining the Sonoran Desert opens with the desert's colors.