Besides being one the most beautiful spots on the planet, the nearly 3,500 square miles of wilderness at Yellowstone National Park (Wyoming, Montana and Idaho) are home to grizzly bears, wolves, and herds of free-ranging bison and elk. Don’t miss seeing Old Faithful, a spectacular thermal geyser that erupts once every 45 to 90 minutes. For more information on Yellowstone, click here. 

While visiting Yellowstone, consider an overnight at Old Faithful Inn, a rustic log hotel with an 85-foot-high stone fireplace in the lobby (from $98 for a room w/out bath to $217 for a two-room suite with bath), or Lake Yellowstone Hotel, the oldest lodging in any national park (from $139). For information on Yellowstone lodging, click here. 

Yosemite National Park encompasses 1,200 square miles of wilderness right in the middle of California! There’s Half Dome, a towering granite peak that sits 8,800 feet above sea level; the Mariposa Grove of giant sequoias (the Grizzly Giant is 2,700 years old); and the stunning Yosemite Valley. For more information on the park, click here. 

While visiting Yosemite, consider an overnight at the laid-back Wawona (rooms start at around $150), an old-fashioned family-style hotel nestled under the pines and aspens four miles from the park’s south entrance. For more on the Wawona, click here. 

Grand Canyon National Park in Arizona is the only official “natural wonder” in the U.S. Best known for its painted desert and sandstone canyon—and the Colorado River, which surges through the valley. For more information on Grand Canyon National Park, click here.

While visiting the Grand Canyon, consider an overnight at Bright Angel Lodge & Cabins, a popular South Rim hotel designed in 1935 by noted architect Mary E.J. Colter. The check-in point for the park’s famous mule rides, the lodge charges $94 for a standard room with bath and $183 for a cabin with fireplace. For more information on the Bright Angel Lodge, click here. 

At Acadia National Park you can explore the rugged coast of Maine, climb Cadillac Mountain (the highest peak on the Atlantic Coast), and hike the park’s historic stone carriage roads. For more information on Acadia National Park, click here.

Consider an overnight at one of two campgrounds at Acadia National Park, including Seawall, rated one of the coolest spots to camp in America (from $14 to $20). For more information on Seawall, click here. 

You can straddle the Continental Divide, hike more than 300 miles of trails, and see some of the most majestic mountain peaks in North America by visiting the Rocky Mountain National Park, including at least 60 peaks that reach an astounding 12,000 feet. For more information about Rocky Mountain National Park, click here.

Overnight at one of five campgrounds in Rocky Mountain National Park, including beautiful Moraine Park ($20 per night), or book a room at the 1909 Stanley Hotel, a Colorado landmark in nearby Estes Park—and the inspiration for Stephen King’s The Shining. For more information on the Stanley Hotel, click here. 

Visit the Great Smoky Mountains National Park (North Carolina and Tennessee) for the sunsets on Clingmans Dome Road, the wildflowers, the 19th-century Mountain Farm Museum and Mingus Mill, and the chance to cruise along what some consider America’s most scenic byways. For more on Great Smoky Mountains National Park, click here.

While visiting Great Smoky Mountains National Park, consider an overnight at LeConte Lodge. It's located at 6,360 feet, near the summit of Mt. LeConte. Depending on the trail, you'll need to hike five to eight miles to get there! A rustic, hand-hewn lodge room or cabin (plus dinner and breakfast) costs $121 per adult per night and $85 for kids. For more information on LeConte Lodge, click here. 

If visiting Utah, be sure to include a trip to Zion National Park. Everyone should see the magnificent 15-mile-long Zion Canyon and Checkerboard Mesas at least once. For more information on Zion National Park, click here.   

While at Zion National Park consider an overnight at Zion Lodge (from $159) or Flanigan’s Inn (from $129), a great small hotel with standard rooms and efficiencies that’s within walking distance of the visitors’ center. For more information on Zion Lodge, click here.