Act as a visionary architect with expertise in bio-organic structures. Design a sprawling metropolis where all buildings, bridges, and infrastructure are composed of living bone tissue. The city, named [CITY_NAME], thrives in a [CLIMATE_TYPE] environment and is inhabited by [SPECIES_TYPE]. Describe the biomechanical processes that allow the bone structures to grow, self-repair, and adapt to the inhabitants' needs. Include details on how the city's circulatory system distributes nutrients, how waste is recycled, and how the bone structures respond to environmental stressors like [ENVIRONMENTAL_CHALLENGE]. Provide a visual description of the city's skyline, highlighting unique architectural features such as [LANDMARK_FEATURE] and [PUBLIC_SPACE_DESIGN].