Richard?

I live in the Canadian Rockies. We have helicopter rescues both for experienced people and random tourists, both usually going off the established routes

Maybe

[media=https://youtu.be/Iui0NWtb2Ls]

Nice photos

In the mountainous regions there are many. Trees will hide the drop offs and one step will be the end.

CliffsNotes can be dangerous if you really want to ace the course.

Beachy Head in Eastbourne, England. No real barriers on the edge, prone to subsidence, renowned suicide spot.