In Act 2: "All The Pretty Horses", after reaching the circus, you have
to repair three attractions. One of the attractions is the carousel (on
the right side of the circus area). You have to use the moving shadows
on the walls to reach the top. The secret bottle is on the balcony at
the top. Collect it before you cut the hot-air balloon loose on the
rooftop to get "The Cyclops' Bottle" trophy.