Waikiki, HI, United States

Waikiki is essentially a manufactured beach resort, with over 2,800,000 cubic feet of imported sand lining its shores. While the iconic Diamond Head backdrop and long, rolling surf breaks make it a popular tourist destination, generating 42% of Hawaii's visitor revenue, the area is plagued by chronic erosion issues that require constant sand replenishment projects. Homelessness is also a persistent problem, with the police force tasked with preventing homeless encampments along the public beaches. For those seeking an authentic Hawaiian experience, Waikiki may leave something to be desired - it is, above all, an artificial oasis catering to the whims of mainland tourists.