In the outskirts of Miami, ill-thought subdivision development codes require developers to build on-site water reservoirs. The result is a patchwork of unconnected pools.
When the Dutch ran into similar problems they built canals and then built their cities around them. Shirking their responsibilities, the planners in Florida only build the standard road grid as the integrator, and transfer all other burdens upon land subdividers, who build at a scale unsuited to the required structure.
Also noticeable is the housing density of Miami increasing outwards, where the newest subdivisions are much denser than the older ones, inverting the natural and historic fabric of cities, and wiping away all established stereotypes about suburban sprawl.