From sky-scraping metropoles to up-and-coming centers breaking the "large town" mold, cities come in all shapes and sizes. But with that diversity comes one simple truth: no city is perfect. They constantly evolve, much like living beings, but sometimes, their systems break down, too. Just ask anybody who's sat in a traffic jam or stood on an overloaded subway car.
To get to the bottom of what qualifies as "badly designed," we picked the brains of several urban planners to highlight the flaws of some of the world's biggest cities. In the end, that birthed a list of nine cities that, for various reasons, are gigantic messes in some way or another.