An HDR view from Upper Antelope Canyon, near Page (Arizona), converted to black and white:

I’ll be posting a longer comparison of Upper to Lower Antelope Canyon at a later date.  For now, let’s just say that a walk through the Upper Canyon is a crowded experience — even in the “off-season,” even on a “Photo Tour.”  So taking shots facing the sky is a good plan.  In any case, the canyon is a unique experience, and always a reliable source of geological abstracts.