Alaska: Denali National Park & Preserve Head to the top of the world to see the Northern Lights. Tent campers in Denali have a front-row seat to this spectacular light show. During the day, borrow snowshoes from the Winter Visitor Center for a trek into the wilderness, where you just might spot snowshoe hare or lynx in their winter coats. Visit nps.gov/dena. California: Yosemite National Park Winter is an ideal time to enjoy the backcountry—particularly with amenities. At the mountaineering school in Yosemite National Park (above), ski guides give tours to visitors who stay in cozy huts and learn about ecology and wildlife during six-day ski trips. Acclaimed kitchen masters offer wine tasting and cooking demonstrations at the Ahwahnee Hotel, and at night professional storytellers spin tales by firelight. Visit yosemitepark.com and nps.gov/yose/planyourvisit/winter.htm. Florida: Everglades National Park The Everglades is best enjoyed at water level. Paddling along in a...