America has always been the most extreme country, from George Washington crossing the Delaware on the back of an alligator to having the first man skateboard on the moon. Pledge allegiance to exhilaration with today's Groupon: for $85, you get four one-day passes to Glenwood Caverns Adventure Park in Glenwood Springs (up to a $168 value). Day passes do not include the 70-foot bungee jump, cave tours, sluice-box mining, or Old Tyme Photos.

Glenwood Caverns Adventure Park, perched atop Iron Mountain, whisks thrill-seeking families through myriad heart-pumping rides and attractions. The Giant Canyon swing flings adrenaline junkies 1,300 feet above the Colorado River at speeds nearing 50 miles per hour, and passengers seated in the private cars of the Alpine coaster get to control the speed at which they take every hairpin turn. This year debuts the Soaring Eagle zip ride, the fleeting offspring of a zip line and ski lift, which sends speedsters zooming down the mountain in a manner more thrilling and patriotic than hang gliding with Martin Van Buren. Though not included in the day pass, Glenwood Caverns also offers walking cave tours ($5 extra) and a brand-new 70-foot bungee jump ($20+). Adventurers seeking new dimensions can dive into 4-D motion theater equipped with motion-enhanced seats and other special effects that make viewers feel like they're actually in the movie, without the lousy pay the comes with being a movie star.

All guests must sign a release waiver before enjoying any rides or attractions, and rides may be closed at any time due to weather or maintenance.