“Canyoning” (canyoneering as they call it down in the US) is descending a canyon that is usually deep and narrow with variable water levels at the bottom (from dry to large creeks).
We hike from the trailhead to the top entrance of the canyon
There we gear up (wetsuit, harness, helmet, etc.)
Then we start our descent passing various natural features (waterfalls, boulders, pools)
Once we’re out of the canyon we hike back to the trailhead