Looking up, the world is reduced to a crescent of sunlight between the cliff walls the river has carved over the eons of time.
Ahead, around the next bend, the river is a trail that you cannot lose. Follow upstream, clothing wet, water sloshing in your hiking boots, and who knows what you’ll find?
[This photo: 18mm in 35mm terms, 2.5 seconds at f/22 and ISO 100, tripod mounted.]