Now, feeling the way become steep before
his feet, he [Frodo] looked wearily up; and then he
saw it, even as Gollum had said that he would:
the city of the Ringwraiths.
(Two Towers, p. 388)
On descrying the dreadful citadel of the Nazgûl, Frodo cowers in terror at the sight: Minas Morgul, the formerly beautiful Minas Ithil, instills great fear with its uncanniness. In the long years that the Ringwraiths had been holding it, they turned Minas Ithil into the place reflecting their own unsettling eerie ghostliness. It is thus no wonder that Minas Morgul is one of the creepiest places in Middle-earth.