Jakobshorn cable car from Davos: http://www.bbdk.ch/
regulation
Entire airspace around 'Davos' closed during WEF (World Economic Forum) end of January!
LS-R at the end of Sertig-valley (check DABS to see if active).
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/de/