How the Grand Canyon Works Its grandness and expansiveness have inspired jokes about what might fit within -- but how big is the Grand Canyon, really? And how did it get that way? The Grand Canyon is at the heart of the 1 million acre Grand Canyon National Park in Arizona. The canyon is the [...]

This article was written by Jennifer Pocock and originally appeared on How Stuff Works. How National Parks Work Imagine for a moment that you're hiking around Indiana Dunes National Park. You're slipping around in black sand dunes on trails that wind along wetland bogs. Prehistoric-looking ferns an...

Two great rivers in the West are the Green River and the Colorado River, which meet in Canyonlands National Park. Located in southeastern Utah -- just miles from the Grand Junction, Colorado, airport -- Canyonlands National Park has become one of the most popular parks on the Colorado Plateau. The ...

Accessible by boat and airplane, the five islands that make up Channel Islands National Park are located off the southern coast of California, near Santa Barbara. There are more than 2,000 species of plants and animals living in and around the Channel Islands, including dozens of species unique to ...

Hawaii's Big Island is in a state of steady expansion, thanks to its active volcanoes. At Hawaii Volcanoes National Park, you can visit the smoldering calderas of two volcanoes, Kilauea and Mauna Loa, and you can see vents and lava tunnels that are spewing forth a fiery show of lava. Entrance fees:...

Watch this iconic park turn from green to gold.

Los Angeles is converting 50 foreclosed homes into "pocket" parks.

Wind-blown plastic bags and balloons outnumber rattlesnakes and tortoises in one of America's most treasured desert wildernesses.