Colorado has four national parks, including Rocky Mountain National Park, which features more than 300 miles of hiking trails alone. Visit in winter for famed ski destinations, such as Aspen and Breckenridge. If you want more urban exploits, head to the capital, Denver.
Stroll the famed Strip among monstrous casinos including the Venetian, Caesars Palace and New York New York. Don't leave without watching the colorful Bellagio fountains or scoring tickets to epic events like a Cirque du Soleil show.