A puzzle has many sides, but only some are visible [Batcave] - Batman Arkham Asylum Riddle

CAVES Room: Main Sewer Junction Location: Climb through this chamber until you have to walk up the second toppled pillar. At the top, on your left will be a fissure in the wall to shimmy on. Shimmy around until you can climb up. Climb up the two ledges here (there is a Riddler Trophy here, too) and stand here at this partly wrecked wall with Detective Mode on. The bottom part is at head level with Batman and the top part is in the distance on the above ledge.