Cedar Falls is very interesting and the geology surrounding the falls is pretty slick, as you'll see when you get there, so I won't spoil the fun with a description here. There is also some very interesting terrain as you leave the falls if you came by way of the Grandma Gatewood Trail from Old Man's Cave and plan to continue on to Ash Cave. You'll have to sneak through some very skinny rock passages and do some rock hopping to get around the bridge that has been destroyed by high water and tree damage.
To get credit for this cache, you'll need to take a picture of yourself with Cedar Falls clearly visible in the background. This is a really great place to take a break if you are continuing on the Buckeye Trail over to Ash Cave. As you are wandering around this area, you'll notice a plaque containing some information about the area. The password for this cache is the last two words of the 1st paragraph, written just as they are on the plaque.