Teifflaui

verified Ungraded Unknown flood risk Innertkirchen, BE

Hardly accessible, this canyon is probably best to do with an overnight just before the start of the canyon (but already after abseiling 500m onto a grass band). However, you will be rewarded with a slot canyon, sometimes less than 1m wide, and a big finish !

Pretty much all the canyon is very narrow, just the last 150m Waterfall opens up towards the Urbach valley.

Logistics

Permit	Ropewiki lists no red tape. The 500 meter rappel needed just to reach the canyon start is the practical barrier here, not any permit system.
Technical	14 rappels, longest 105m
Season	Summer
Coordinates	46.67806, 8.19581

Sources

permit: https://ropewiki.com/Teifflaui
nearest town: https://www.openstreetmap.org/#map=15/46.67806/8.19581