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新罕布什尔州的县桥 County Bridge in New Hampshire (© Denis Tangney Jr/E+/Getty Images)

Bridge of Hillsborough County

The County Bridge has offered a picturesque passage over the Contoocook River in southern New Hampshire since 1937, when it replaced its covered predecessor that had been destroyed in a flood. But why even build a covered bridge? In a word, longevity. The roof and walls help protect the timber supports from rot. For comparison, an uncovered wooden bridge lasts an average of 20 years, while the covered variety can reach 100 years or more.

But even their durable reputation couldn't withstand our drive toward faster travel—the railroad, the automobile, and the heavier loads that came with both. As iron and then steel replaced timber as the bridge-building material of choice, covered bridges gradually went the way of the horse and buggy that used to traverse them. Out of about 12,000 covered bridges that were built in the US, only 750 remain today, with a quarter of those in Pennsylvania.

半月湾南瓜地鸟瞰图，加利福尼亚 Aerial view of a pumpkin patch in Half Moon Bay, California (© Tinker Street/Michael O'Neal/Gallery Stock)

The height of pumpkin season

If you happen to be in the Bay Area this weekend, you might want to swing by the Half Moon Bay Art & Pumpkin Festival. The annual event displays enormous champion pumpkins weighing over a thousand pounds, hosts live pumpkin carving demonstrations, and offers really every kind of pumpkin-related food you can imagine, from pies to pumpkin flavored artisanal cocktails. Plus, Gourdy, the anthropomorphized pumpkin mascot. While California is the leader in the consumer pumpkin harvest, it is only the second-largest producer in the country. Illinois grows approximately a quarter of the 2 billion pounds of pumpkins the US produces yearly, though 80 percent of that ends up as pie filling or other processed products. Pumpkins require between 90-120 days to mature, so most are planted by late May or early June to coincide with our Halloween carving needs.

While carving vegetables into faces is a tradition in many parts of the world, the carving of jack-o’-lanterns around Halloween originated in Ireland in the mid-19th century, using potatoes or turnips. Irish immigrants brought the tradition to the US around the same time and discovered that the native pumpkins were much easier to carve.

烟囱岩和安肯帕格里国家森林，科罗拉多州 Chimney Rock and Uncompahgre National Forest, Colorado (© Cory Marshall/Tandem Stills + Motion)

Fall color sweeps across the West

The leaves are changing across the West, and few views are more striking than this one of the fall foliage in the Uncompahgre Forest in the shadow of Chimney Rock. The spire and its neighbor Courthouse Mountain dominate the landscape here year-round, but the changing colors make this area—and drives along the nearby Million Dollar Highway—even more scenic in the fall.

The forest gets its name from the Native Americans who have historically lived here, a band of Ute Native Americans called the Uncompahgre Ute People. The Ute People came to what is now Colorado and Utah around 1300, and usually spent their autumns traveling to make offerings to the spirits and hunting buffalo. And, we presume, admiring the spectacular fall colors.

阿卡迪亚国家公园的高丛蓝莓植物，缅因州 Highbush blueberry plants in Acadia National Park, Maine (© Danita Delimont/Gallo Images/Getty Images Plus)

Acadia transformed

Historically, mid-October is peak fall foliage season in Maine's Acadia National Park. The forest canopy is aflame with autumn color, and here, the highbush blueberries on the forest floor provide an additional splash of color. Acadia has six marked coastal trails, and our photo today was taken on one of the most popular: Wonderland Trail. It's just 1.4 miles round-trip, an easy trek for families and casual hikers. Acadia is Maine's only national park, and it's easy to see why this landscape was preserved—look at that beautiful fall color, and that's just at ground level.

拱门国家公园，犹他州莫阿布 Arches National Park, Moab, Utah (© Whit Richardson/Alamy Stock Photo)

Art in the high desert

The desert doubles as an art studio this week at Arches National Park, as painters from all over congregate for the Red Rock Art Festival. This Moab-based event is a celebration of what the French call painting 'en plein air,' or painting outside. Sounds like a fabulous idea to us (and what a view!). The colorful landscape here at Arches National Park is home to the highest density of natural arches in the world—upwards of 2,000—as well as more pinnacles and dramatically balanced rocks. Combine that with the fiery sunsets, pinyon trees, and splashes of sage and yucca, and we’d say these artists are in for a treat. Lucky for them, October is a pleasant time to visit the harsh, desert landscape.

莱奇沃思州立公园，纽约 Letchworth State Park, New York (© Jay O'Brien/Danita Delimont)

'Grand Canyon of the East'

It's easy to see why Letchworth State Park in New York has earned this 'Grand' title. About 60 miles southeast of Buffalo, the 17-mile long park protects a stunning section of the Genesee River that cuts through a deep gorge. The cliffs, close to 600-feet high in some places, offer knockout views of several waterfalls and the thick deciduous forest. The historic Glen Iris Inn, once the home and refuge of industrialist William Pryor Letchworth, overlooks Middle Falls. In 1906, Letchworth bequeathed his 1,000-acre estate to the state of New York. The parcel would become the heart of this 14,427-acre park that bears his name.

Cleveland Clinic Lou Ruvo Center for Brain Health in Las Vegas, Nevada (© Garry Belinsky/Offset)

From the mind of Frank Gehry

Today's image features the Cleveland Clinic Lou Ruvo Center for Brain Health in Las Vegas, designed by world-renowned architect Frank Gehry and his firm, Gehry Partners, in 2005. The building consists of three different elements: a medical building with spaces for patient care and research; the Life Activity Center, a for-hire event space which helps fund the center's research; and a breezeway connecting the two spaces. Some have likened these elements to the hemispheres of the brain itself, with the medical building representing rational thinking and the event space giving form to creative thinking.

A fair that's star-studded

Meet Texas Star, one of the tallest Ferris wheels in North America and a big attraction at the State Fair of Texas. Built in 1985, on a clear day it can be seen from Fort Worth, about 40 miles away. Since 1886, locals and visitors have come to Dallas' historic Fair Park for food, rides, shows, and other attractions. About 100,000 people a day now visit the fairgrounds to experience the array of activities and treats, from the largest new car show in the Southwest to a bevy of culinary delights. You can try deep-fried shepherd's pie, fried beer, or something called deep-fried skillet potato melt. Awards are given to the tastiest concoctions. But the fair's flavor extends beyond food. The purpose is to promote Texas agriculture, education, and community. There's plenty to do after exploring and sampling one-of-a-kind bites, including live music, pig races—and don't forget to ride the Texas Star.

Wild scene on the Merced River

Signed October 2, 1968, by President Lyndon B. Johnson, the Wild and Scenic Rivers Act preserves rivers with 'outstanding natural, cultural, and recreational values in a free-flowing condition for the enjoyment of present and future generations.' It covers 13,416 miles of streams and protects parts of such natural treasures as the Allagash, Salmon, Snake, Concord, Fortymile, Trinity, Missouri (the longest river in the US)—and the Merced River, which we're looking at here.

California's Merced makes its way through canyons, mountains, and foothills, flowing from the Sierra Nevada mountains, through the southern part of Yosemite National Park, into the San Joaquin Valley. Rafters enjoy the Class III and IV rapids, and visitors can camp at several sites along the river's course while also exploring the Merced River Trail.

This view is brought to you by…

Here's a nice spot to enjoy National Public Lands Day. Hocking Hills State Park, a 2356-acre park in southern Ohio, offers over 25 miles of hiking trails that pass by unusual rock formations, recess caves, and stunning waterfalls. This is Upper Falls, at one of the park's most popular hiking destinations, Old Man's Cave. This huge recess cave, as the legend goes, was named for a hermit who lived here in the 1800s. Then there's Devil's Bathtub, Conkle's Hollow, and Rock House—sites worthy of a visit for their names alone, though the scenery won't disappoint.

Held annually on the fourth Saturday of September, National Public Lands Day aims to encourage people to enjoy our public parks as well as volunteer for one of the many projects going on today, like helping with trail maintenance or tree planting. At national parks, monuments, and other participating federal sites, admission is free today. At Hocking Hills, you can join a free naturalist-led walk leaving from the Whispering Cave trailhead. Be sure to grab a free litter bag to help pack out what others have left behind.

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