13- Juneau, Alaska
This is the furthest American frontier you can access, which makes Juneau so exciting and action-packed. Among the tumbling glaciers you can spot a plethora of wildlife creatures such as eagles, spots bears, seals and several other indigenous Arctic wildlife. The best place to see them is Tracy Arm Fjord, which is a waterway encircled by imposing and sharp, jagged cliffs. Dogsledding and hiking on Mendenhall Glacier (13 miles of ice) or go rafting on the popular Mendenhall Lake. Enjoy a tour of Alaska’s often neglected rainforests with a trip to Glacier Gardens.
12- Boulder, Colorado
Colorado might have hit headlines recently when they legalized marijuana, but Boulder has a lot more to offer than narcotics. The city sits in the Valley between the Rocky Mountains and the Great Plains and is resplendent with natural beauty. A glance in any direction will instantly reward you with mountainous backdrops or verdant, open plains.
Two words: The Flatirons. These steep rock slats are synonymous with Boulder. If you brave a hike, be sure to bring sturdy footwear. Other heart-pumping adventures adrenaline junkies can enjoy: kayaking, biking, horseback riding or hiking Eldorado Canyon State Park.