Abstract: The subject matter disclosed herein generally relates to modular storage structures. In one non-limiting embodiment, a modular structure includes a plurality of stackable, inter-engaging blocks. Two or more of the blocks include at least two openings, and the blocks are configured to be removably coupled to one another with an opening of a first block aligned with an opening of a second block. The modular structure also includes at least two elongate members positionable through aligned hinge openings of at least two of the plurality of blocks positioned adjacent to one another. The modular structure also includes at least one reinforcing member structured to extend between and engage the at least two elongate members between stacked layers of the blocks. Other embodiments, forms, aspects and features are disclosed herein.