Dubai, UAE

Dubai has built more iconic skyscrapers in 25 years than #2 Chicago produced in a century, including the record-breaking Burj Khalifa (828m), the twisted Cayan Tower, the sail-shaped Burj Al Arab, the Dubai Frame, and the Museum of the Future—a torus-shaped steel marvel covered in Arabic calligraphy. Its skyline expanded 300% faster than the average global city since 2000.