You mean the Old Quarter in Thief? Or what? Bonehoard?
I don't play a game if it doesn't have either:
a)memorable tunes which help me get to the rythm of the game instantly
and remember it after many years e.g; Thief, Mafia, BG 2, etc.
b)great ambience, which both helps the immersion and
is synonymous to the game's atmosphere, and/or ups the
tension/creates sounscapes; e.g Half-Life 2 Prince of Persia: WW,
Fallout 2, Call of Duty, etc
"Pipe-blown music in the tombs. How classic"