As a discussion contribution, a new concept for solving problems of bank protection structures based on topological interlocking is presented, which opens up a way to obtaining new segmented or modular designs of building elements and structures. The relevance of the modular design principle based on the use of natural laws of harmonization of artificially created forms is justified. In this concept, the idea of Platonic solids is further developed in a quest for new types of harmony and practical technological and engineering design applications at macro scale. The ever growing capabilities of modern building materials and technologies make it possible to create new construction systems on the basis of the modular principle, one of the most interesting forms of which is topological interlocking. This innovative principle of engineering design and its many advantages are considered in relation to bank protection structures. Variants of new promising designs based on topological interlocking are presented.