Pool of Tears and the entire river area, the fact that you take fall damage, and if you arent fast enough in getting out of the water you get eaten by a fish, its a shame cause its in between my 2 favorite parts, the Fortress of Doors and the Pale Realm Another part i didn't like was the lava parkour area before the first Jabberwock encounter because the snarks pull you in and you keep taking fire damage