@Nina1463
This is important, and I'm glad you are paying attention to it.
A couple questions...is it fenced? Is the fence to safety code? On whose property is the fence, the cliff? How about signage (appropriate or not, what it might say?) Have you consulted your insurance agent and attorney for an opinion? You've said that you had an attorney write up a release - what else did you learn from them about potential liability and due diligence? These professionals who should know the ins and outs, in your state, would be the best source of factual, reliable information, imho.
Best of luck, and the best protection for yourself and your guests.