The Stack of Crates is a Tall Obstacle found in the Forest. It can be avoided by either swiping to the side or jumping over it using the Spring Shoes boost.
Two brown crates with dark brown planks are stacked on top of one another. The create on top is slimmer than the one on the bottom. The crate on the bottom has an extra reinforcement plank going diagonally across on all visible sides.
The aesthetics of the Stack of Crates is the same as the Crate.