The walls of Zion Canyon soar more than 2,000 feet above the valley below, but it's the character, not the size, of the sandstone forms that defines the park's splendor. Throughout the park, fantastically colored bands of limestone, sandstone, and lava in the strata point to the distant past. Stripes and spots of greenery high in the cliff walls create a "hanging garden" effect, and invariably indicate the presence of water seepage or a spring. Erosion has left behind a collection of domes, fins, and blocky massifs bearing the names and likenesses of cathedrals and temples, prophets and angels.
Trails lead deep into side canyons and up narrow ledges to waterfalls, serene spring-fed pools, and shaded spots of solitude. So diverse is this place that 85% of Utah's flora and fauna species are found here. Some, like the tiny Zion snail, appear nowhere else in the world.
The Colorado River helped create the Grand Canyon, while the Virgin River—the Colorado's muddy progeny—carved Zion's features. Because of the park's unique topography, distant storms and spring runoff can transform a tranquil slot canyon into a sluice.