Winterlight Island, or at least the portion up to the winterwight.

Walk ( 6s, ne, 2s, se, 2e, s, 2sw, s, 4sw, 4s, 5se, 2s, d, s, se, s, 3se, 3e, 2s, 2e, d, se, ne, s, d, se, s ) to get from DH to the room marked in blue.