The Navajo Nation's Antelope Canyon Tribal Park is just outside of Page, Arizona. It consists of a couple narrow, twisting slot canyons carved into the sandstone by flash flood waters rushing to Lake Powell. Sunlight entering through the top of the narrow canyon creates unearthly glows and alternating areas of bright light and shadow. These pictures are from my 2004 visit to the park.

Mark Wasson, http://www.markwasson.com > Trips has detailed summaries of my trips