we did the zip line at YS falls and it was pretty fun. Not one of the biggest but i believe there were 4 different stages(i heard a rumor that they have addded another stage since then)

I believe it was around $30us pp(double check that) and it lasted about 30 mins in total. My husband is more of the adrenaline junkie and he had a good time. Well worth the ride to ys(plus they have a rope swing into some beautiful water and some beautiful scenery to take in while you are there)

Hope this helps.