Not a whole lot going on in The Grotto but it does have (what is said to be) the nastiest fingercrack roof climb east of the Mississippi (Champagne Jam). Deeper into the maze of formations are several climbs. Watch out for loose bolts they're everywhere down in here. Walk as far north as you can and there is a really cool natural arch, not a route on it but cool to check out.
From the parking area, walk toward the valley towards Fire Place Rock, turn left walk up to the next formation. Enter through the natural door way or veer left then right into The Grotto proper.