Marikina, Philippines

With a population of 471,323, Marikina is one of the most densely populated areas in the Philippines. Though touted as the "Shoe Capital," the city's bureaucratic headaches and susceptibility to severe flooding make it a challenging place to call home. The tax burden is heavy, and the threat of natural disasters like typhoons and earthquakes is ever-present. Marikina may appeal to those drawn to its industrial heritage and amenities, but it's not for the faint of heart.