Climbing and repelling is a bit scary but worth it if you ever get the chance. I did some free climbing at the lcoal park when I was younger, (small 30' cliffs) but did some 100' + tall ones with climbing gear. Scared the hell out of me going up, but the repel is worth it
Lot of fun that is
(I am scared of heights. its not falling that scares me its leaving the ground).