4 Best Sights in Aspen and the Roaring Fork Valley, Colorado

The majestic Maroon Bells, twin peaks more than 14,000 feet high, are so colorful, thanks to mineral streaking, that you'd swear they were blanketed with primrose and Indian paintbrush. It's one of the most photographed spots in the country, which is why reservations are required to ensure the view. Before 8 am and after 5 pm in the summer, cars can drive all the way up to Maroon Lake (though vehicles with children in car seats or people with disabilities are allowed to do so at any time). Otherwise, parking is available at the Aspen Highlands garage, where guided bus tours and shuttles leave regularly in summer months.

Glenwood Springs is home to the Historic Fairy Caves (now part of the adventure park), whose subterranean caverns, grottoes, and labyrinths are truly a marvel of nature—the area was touted as the "Eighth Wonder of the World" when it opened to the public in the 1890s. The still-amazing caves are easily accessible year-round via the Glenwood Gondola, which offers a bird's-eye view of downtown, the Colorado River, and surrounding mountains. Choose from two different 40-minute walking tours of the caves, or opt for the crawl-on-your-belly "Wild Tour" spelunking adventure. For a second helping of adrenaline, try the gravity-powered alpine coaster that winds down 3,400 feet down the mountain; sail out over 1,300 feet above Glenwood Canyon on a giant swing; or drop, roll, and twist on the Defiance roller coaster that overhangs a cliff.

Even before the heyday of the adjacent Hotel Colorado, Western notables such as gunslinger Doc Holliday came to take advantage of the area's curative spring waters. The smaller pool at Glenwood Hot Springs is 100 feet long and maintained at 104°F. The larger is four times that size and contains more than a million gallons of constantly filtered water that is completely refilled every six hours and maintained at a soothing 90–93°F. Seasonal favorites include a children's area with a splash pad, fountain, waterslides, and an on-site pizza stand and café.

Interactive, age-appropriate play areas for young children and a full menu of activities for older children and teens make the Treehouse Kids' Adventure Center in the Snowmass Base Village a good headquarters for family fun. Summer camp activities include mountain biking, skateboarding, and mountain boarding. When winter comes, the center serves as an upbeat base camp for ski lessons.