Interested in lending a hand at Everglades National Park? On Saturday park staff will be looking for volunteers to help with removing invasive plants in the "Hole" in the Donut restoration area.

Kelso Depot, fully restored and back in business, is a great reason by itself to visit Mojave National Preserve in the California desert.

The nation's front yard -- the National Mall in Washington, D.C. -- is hammered pretty hard each year by more than 25 million visitors. To reduce their impact on the grassy expanse, Interior Secretary Ken Salazar has directed the National Park Service to better manage the promenade that stretches from the Lincoln Memorial to the U.S. Capitol.