A moratorium is in effect on adding information from Fire and Blood until December 20th.
Hardin's Tower is one of the towers of Castle Black. It has a broken battlement, from which stone has spilled into the yard below and a lean.
A Game of Thrones
A Dance with Dragons
Hardin's Tower becomes the residence of the wildling women who accept Jon's call. Some of the men of the Night's Watch attempt to take advantage of the women there; although the spearwives turn them away, the men hostilely refer to the building as "Harlot's Tower". The giant Wun Weg Wun Dar Wun sleeps in its entryway to guard it.