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Access
chair lift: https://www.surselva.info/Bergbahnen-Brigels-Waltensburg-Andiast/Winter/Tarife
Rules
several wild protection areas!!!
Airspaces in Switzerland are a tough subject, get all the info you can get before flying: http://www.flyland.ch.
DABS (active danger areas etc): https://www.skybriefing.com/portal/