Students at the University of South Carolina have been working on installing a 25-foot bridge at Sesquicentennial State Park.

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed ...

Washington officials have closed the only bridge to the northwest corner of the park over safety concerns. And they might not ...

The bridge closure isolates key areas of Mount Rainier National Park. A $1.5 million study will determine next steps.