8 X 10 Photo taken by Terri Nagel, Matted for framing.

"The Sentinel" in Antelope Canyon likely refers to a specific viewpoint or landmark within the Antelope Canyon area, specifically related to Upper Antelope Canyon. It's a prominent feature used as a marker for photographers and visitors to capture the unique rock formations and light play within the canyon. Antelope Canyon, particularly Upper Antelope Canyon, is a popular slot canyon that attracts visitors due to its stunning sandstone formations and the way sunlight filters through, creating vibrant colors.