Sitting in an old-growth spruce fir forest, Doug Smith says he can see firsthand the impact of reintroducing wolves on the larger ecosystem of Yellowstone National Park. Long before Yellowstone became ...

Can Kentucky sweep the porch at Abraham Lincoln Birthplace National Historical Park and California sound the foghorns at ...

This Wyoming airport took impressive steps to reduce light pollution and earned a rare certification for its efforts to ...

For great views on the water (and under the water when it comes to this lake's beautiful multicolored rocks), this Montana ...