Jefferson National Expansion Memorial in St. Louis and the grounds around the "Gateway Arch" could look very different in the years to come, depending upon the outcome of a plan that is currently being developed. This plan could have far-reaching implications and public comments are currently being accepted. Here's what you need to know about this issue.

What in the world was Jim Hansen thinking back in the 1990s when, as a U.S. representative from Utah and chair of the House Resources Subcommittee on National Parks, Forests and Lands, he said Great Basin National Park should be removed from the National Park System?

He labored in the shadow of the National Park Service’s founding fathers, but Robert Sterling Yard was one of the best advocates the agency ever had.

Aztec Ruins and the River of Lost Souls may sound like a title for the next Indiana Jones movie, but these are real places that you can visit—and you won't even need a passport or a hyper-active spirit of adventure. One small disclaimer is in order: The Aztecs had no connection with these impressive remains of a long-departed civilization.