Two rangers from Glen Canyon National Recreation Area were killed in a plane crash, Park Service officials said Saturday.

There's no question the stunningly blue water inside the caldera at Crater Lake National Park is a vital park resource, so when scientists began wondering some years ago if the water was becoming less transparent—and why—researchers went to work.

If you're running public tours in a cave, it's always a good idea to be able to communicate with people on the surface, and vice versa. The staff at Oregon Caves National Monument can do so a lot more efficiently these days, thanks to a recently completed upgrade of the communications system in the cave.

If the weather cooperates, the Beech Mountain fire tower in Acadia National Park will be open on Saturday for visitors interested in getting a canopy-level view of the park's fall foliage.