ATTENTION: in the whole valley ('Engelbergertal') there are NUMEROUS, UNMARKED, BARELY VISIBLE cables!!!
Check info at gondola stations/ ask local pilots! This cables very often are in positions, where you would expect them last!
Access
Gondola from 'Engelberg': https://www.titlis.ch/en
Rules
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/