America's national park system is booming, and the parks exist largely to protect fantastic and notable natural wonders. Can you identify these national parks from a famous feature?
Yellowstone is famous for a geyser named Old Faithful, a 204-degree Fahrenheit monstrosity that blasts nearly 190 feet into the air. And it does so with regularity -- about every 60 to 90 minutes, making it a true crowd pleaser.
Delicate Arch is an iconic stone arch in, of course, Arches National Park. The opening beneath the arch is 46 feet high and 32 feet wide, making it the most spectacular arch in the park.
In Yosemite National Park, you can spy Half Dome, a huge granite peak that looks a lot like a dome that's been sliced in two. It rises more than 4,700 feet above the valley below.
The Grand Canyon is famous for being about 1 mile deep in some places. Most people will view it from the top ... but a few intrepid explorers will hike to the bottom and back.
In Utah, Bryce Canyon offers up one of the most surreal spectacles in the United States. The park is overflowing with bright orange sandstone hoodoos that look like an alien world straight out of "Star Wars."
In New Mexico, you can visit White Sands National Monument, where there are unending dunes of pure white sand. And yes, the park service uses snow plows to clear blowing sand from the roads.
Death Valley National Park is easily the most ominous national park name, and one of its primary features is Badwater Basin. The Basin is the lowest point in all of North America ... more than 282 feet below sea level.
The South Rim is the most-traveled area overlooking the Grand Canyon. The North Rim, on the other hand, is higher, more remote, and much harder to get to.
The Subway is a famous and gorgeous slot canyon in Zion National Park, in Utah. As its name implies, The Subway looks a bit like a manmade subway tunnel.
Oregon is home to Crater Lake National Park, which features a massive body of water inside a collapsed volcano caldera. The lake is incredibly deep -- in some places, its depths reach to 1,949 feet.
Located in southern New Mexico, Carlsbad Caverns has nearly 120 large caves, many of which are accessible via the park's walkways. The largest cave is reportedly about 120 miles long.
In Glacier National Park, visitors have the unique opportunity to drive (slowly and carefully) up the twisting Going-to-the-Sun Road, which scales steep peaks to Logan's Pass. The road is closed each fall as winter snows bury it in drifts that may be 80 feet deep.
At Great Sand Dunes National Park, near Alamosa, Colorado, you can clamber up the side of Star Dune, the tallest mountain of sand in the park. It is roughly 750 feet tall.
Great Smoky Mountains National Park, in Tennessee and North Carolina, is the most-visited national park in America. Each year, more than 11 million people travel here to get a glimpse of the gorgeous Blue Ridge Mountains.
Visitors to Rocky Mountain National Park will be near the Continental Divide. The water on one side of the Divide flows into the Pacific Ocean; on the other side, water flows to the Atlantic.
El Capitan is a famous sheer cliff face located in Yosemite National Park. It rises about 3,000 feet straight up, and it draws mountain climbers from all over the world.
Colorado's Rocky Mountain National Park is home to Longs Peak, one of the most prominent mountains on the Front Range. It is 14,259 feet tall and located less than 10 miles from Estes Park.
At Carlsbad Caverns, you can behold the majesty of The Big Room, or The Hall of the Giants, a massive cavern that has floor space of nearly 360,000 square feet.
Trail Ridge Road is the highest through road in the United States, and if you visit Rocky Mountain National Park in Colorado, you can drive it. About 8 miles of the road reach higher than 11,000 feet.
Grand Prismatic Spring is the largest hot spring in Yellowstone National Park. Its 160-degree Fahrenheit waters are wildly colored, featuring almost all of the hues of a rainbow.
Kilauea is an active volcano in Hawaii Volcanoes National Park. It has been erupting almost continuously since the early 1980s, though not exactly in an apocalyptic fashion.
Located in California and Nevada, the deserts of Death Valley National Park are incredibly hot. Summertime temperatures can exceed 130 degrees Fahrenheit.
In southwestern Colorado, visitors to Mesa Verde National Park can see the magnificent cliff dwellings created by prehistoric people. That includes Cliff Palace, a sprawling structure with more than 150 rooms.
Jackson Hole is a booming, quirky tourist town in Grand Teton National Park. It's quickly become one of the hottest destinations in the Wyoming area.
Wonder Lake is often called the crown jewel of Denali National Park in Alaska. The only way to get there? A 92-mile shuttle trip.
In California's Kings Canyon National Park, visitors can witness giant sequoia trees, including the General Grant Tree. The tree is the second-largest in the world, measuring nearly 270 feet tall, with a diameter of around 29 feet.
In Virginia, visitors can drive the 100-mile long Skyline Drive, a famous road in Shenandoah National Park. The road is incredibly popular, particularly when tree leaves began changing colors in the autumn.
Hubbard Glacier is a 76-mile-long behemoth located in Wrangell-St. Elias National Park in Alaska. Like all glaciers, it moves very slowly ... it takes about 4 centuries for ice to travel from the glacier's origin to its end point.
The Hall of the White Giant, at Carlsbad Caverns National Park, is a room featuring a large white stalagmite formation. But to see it, you'll have to sign up for a guided tour that requires a bit of physical exertion.
A giant sequoia named the General Sherman tree is the biggest tree in Sequoia National Park in California. It is about 275 feet tall, with a base diameter of more than 36 feet. It is regarded as the biggest living tree on Earth.