Rising grizzly bear deaths, climate change, and the biological island that is the Greater Yellowstone Ecosystem all were cited Friday when a coalition of groups announced plans to sue the Trump administration to prevent the removal from the Endangered Species List of grizzly bears in the ecosystem.

Rangers at Wind Cave National Park in South Dakota will be offering a variety of interpretive programs this summer. Thirty tours will be offered through the world’s sixth-longest cave each day beginning at 8:40 a.m., with the last tour entering the cave at 6 p.m. In addition, there will be tours of the Sanson Buffalo Jump and bird walks.

Located 70 miles west of Key West, Florida, Dry Tortugas National Park is one of the most remote national parks in the United States. Visitors can only access the park via boat, seaplane, or aboard the official Dry Tortugas National Park ferry, the Yankee Freedom III. As a result, the park boasts some unusual facts that not all park travelers might know.

Here's a unique way to mark the Fourth of July holiday at Cape Cod National Seashore: Take in a showing of the 1975 classic "Jaws," and go over shark safety guidelines for enjoying the seashore.