art
background
bar
bars
black
block
building
cage
camp
cell
closed
concept
contour
crime
criminal
depression
despair
flat
freedom
grate
grid
hope
icon
illustration
incarceration
iron
isolated
jail
justice
law
line
linear
lineart
lock
lockup
metal
outline
prison
prisoner
punishment
rod
room
security
sentence
steel
violence
wall
white
window