alert
astray
attention
background
blue
border
borderline
boulder
caution
closeup
communication
damage
danger
dangerous
error
exclamation
hazard
icon
illustration
information
mark
message
mountain
nature
notice
orientation
outdoor
point
prevention
protect
protection
risk
road
safety
scratch
scratched
shape
sign
signs
stone
stones
stop
symbol
travel
triangle
view
wander
warn
warning
white