In any city, in any country, go to any mental institution or halfway house you can get yourself to. When you reach the front desk, ask to visit someone who calls himself "The Holder of the Sacrifice". A look of bliss should then come over the worker's face, and they will ignore you. You will hear an unending groaning reverberate off of the walls from the area furthest from you. It is of utmost importance that you listen to where the sound echoes from. Should the source of the noise change, stand still for five seconds and extend your right arm, displaying your palm towards the darkness.