This fall has been a tough one for those who love the wolves of Yellowstone National Park, as more than a few of the predators have been killed outside the park by hunters. Wolf hunting and trapping also is an issue in the Midwest, and the controversy around that issue prompted writer Greg Breining to take a close look at how wolves and science intertwine. It's not always as neat as you might think

Part of the fun of the National Park System is exploring the various units to see what they have to offer. Here's a look at parks the Traveler "explored" in 2012.

Mount Rainier is known for its subalpine meadows filled with bright, colorful wildflowers in late July to mid-September, depending on the year, but photographing the mountain in its many moods requires spending time on it throughout the year.

Programs for exploring nature with children and discovering the park’s backcountry will be offered this winter and spring at Wind Cave National Park.