A cliff in a dream often marks a decision point where the next step carries real risk -- a choice you can't easily walk back from once it's made. Standing at the edge can mirror hesitation about committing, while the fear of falling usually names anxiety about what happens if the choice doesn't go the way you hope.
Those houses which behold not the Ascendant signifie occult or obscure places, and these houses are the 12th. 8th. and 6th. - William Lilly (1602.-1681.)