The Longest Ladder
Interestingly enough, Ashes of Ariandel also features the longest ladder you’ll find in Dark Souls III. When you’re on the icy surface (after cutting the rope bridge and descending), take a left to find some giant ice crabs and the creepy tree ladies. You’ll find a slope heading upwards on the right-hand side, but ignore that for now. Continue on the ground path, and take out the tree ladies as you go. At the end of the path, kill the final tree lady guarding the Snap Freeze sorcery, then turn around and go up the slope you skipped earlier.
A ladder will spawn at the side, and you can climb up to collect a new Titanite Slab for upgrading your weapons. This is the same ledge that you explored earlier on in the game, where you encountered the flies and the Follower knights. Heading down the ledge will lead you to the slope that takes you to the Corvian settlement.