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Saxeten puts you in the water, among rock walls, with slides, pools and short abseils linking the way through. It is the shorter introduction in the local canyoning range, a good place to look if a full canyon expedition sounds like too much.
Shorter still means an active, guided outing in cold water. Read the operator's swimming, health and participation requirements before booking, and let the guides decide what the day's conditions allow. Keep some free time afterwards for dry clothes and a proper meal. Another tightly timed adventure would be a lot to squeeze in.