Zion Canyon Scenic Drive: The 12-mile round-trip drive through Zion Canyon is impressive no matter how you do it -- in your own vehicle (in winter only) or on the shuttle from spring through fall. In every direction the views are awe-inspiring, as the massive stone formations reach for the heavens. The road also provides easy access to a number of wonderful viewpoints and trail heads just off the roadway.
Angels Landing: The strenuous Angels Landing Trail leads across a high narrow ridge to a spectacular and dizzying view of Zion Canyon. Warning: The last half-mile of this trail is along a knife-edge ridge -- definitely not for anyone with a fear of heights.
The Narrows: The sheer 1,000-foot-high walls are awe-inspiring, almost frightening, as they enclose you in a narrow world of hanging gardens, waterfalls, and sculpted sandstone arches, with the Virgin River pouring over and around your feet and legs. The Narrows are too narrow to allow you to walk next to the river, so you have to wade right through it -- but the views make it worth getting wet. Warning: Because the Narrows is prone to flash flooding, check weather forecasts carefully before setting out.