Fodor's Expert Review Glenwood Caverns Adventure Park

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.