Places In Photos: Most Unaffordable Cities To Live Worldwide A.S. 0 Hong Kong, China Only 9 sq m flats can rent for at least $400 here, making Hong Kong the most expensive city for the seventh year in a row. Photo: Martin Puddy/Getty Images Pages: 1 2 3 4 5 6 7 8 9 10 <1 ... 89 10