Sesriem Canyon, Namib Naukloft Park
Sesriem Canyon is located less than 5 km from the Sossusvlei entrance to Namib-Naukloft National Park. It was a totally unexpected find. In fact, we'd actually driven across the dry tributary riverbed many times, and done so just a couple hundred meters from the head of the canyon. We'd had no idea it was there. None at all. The canyon is a long cleft rent into the rock that at points is less than 6 feet wide and more than 100 feet deep. In fact, the name comes from the original Afrikaans settlers who would use Oryx-hide straps ("riem") to pull water from a relatively permanent pool at the canyon's head. It took six ("ses") such straps to reach the bottom, hence, Six-Strap Canyon.
Less than two feet in front of Donna, the river bed, which is a few feet deep at my feet, plummets the better part of a hundred feet into the Earth.
Don't believe me? The photo on the left was taken from below looking up toward where she's crouched. The photo on the right should give a little sense of scale.
Just for the record there is a nice set of rock stairs into the canyon. Our first attempt was a little sketchier than it probably should have been, and definitely than it needed to be. Fun bit of scrambling though.
Once we found the stairs we actually headed downstream first, to get a little bit of hiking in. In turns out the canyon's only a couple of kilometers long so it didn't take long to explore the vast majority of it.
And then it ends. A couple of kilometers downstream from the narrow head, the river bed washes out into a wide arroyo. So long geology.
We did spot some cool birds on the way out. The given name of the Pigeon is the Rock Dove, and these were actually doing as their feral Rock Dove brethren should do, roosting in the rocks.