If you're planning to visit Zion National Park in Utah during the long Memorial Day Weekend, plan on it being crowded.

Two young grizzly bears have been founded dead in Grand Teton National Park, the apparent victims of another grizzly.

The Yellowstone Plateau Volcanic Field has some of the largest rhyolite lava flows on Earth. Have you ever wondered what these flows look like in their interior, or how the unique textures that can be observed in rocks across Yellowstone National Park formed?

Drive 75 miles (121 kilometers) from busy Washington, D.C. and you’ll enter 200,000 acres (>80,000 hectares) of protected geography rich with history and the ghosts of Civil War soldiers vying with songbirds and waterfalls to tell their stories. Shenandoah National Park in Virginia is a landscape of ancient mountains, rolling hills, shadowy backwoods, and quiet hollows.