Strawberry tower small space gardening helper! Don't know what this is, or used to be, but the slanted shelves would allow you to grow more plants in the same space - allowing enough dirt for the plant to grow comfortably, but forcing it to find the sun through the front of the shelving unit.
This passage way made with the same shipping pallets could be perceived as a dual natured pallet wood creation. This is a decorative measure, and also a protective measure as well as it would prevent us from some tiny harmful worms and bugs that might cause irritation and inflammation. And the wooden planter is even better than that.