These 2 pictures show us some hard core guerrilla marketing examples.
Image 1: LEGO’s really creative billboard that inspires the kid in you.
Image 2: LOVE this creative billboard by WWF. Unique overhang places shadow on billboard to create this changing message

LEGO’s really creative billboard that inspires the kid in you.

LOVE this creative billboard by WWF. Unique overhang places shadow on billboard to create this changing message