Thirteen helicopter rescues have occurred over seven days at Grand Canyon National Park, the National Park Service said in a statement Sunday.

With such ancient history, there are tales and myths to be told as we walked through the swirling sculpted corridors ...

Everything’s bigger in the US, they say, and that apparently includes its river gorges. But don't be fooled by its grand size ...

Scientists and park managers once thought giant sequoia forests nearly impervious to stressors like wildfire, drought and pests. Yet, even very large trees are proving vulnerable, particularly when ...