The largest city in China is also its most cosmopolitan, offering visitors a chance to experience the past, present, and future all at once. The Huangpu River splits Shanghai into two districts: Pudong and Puxi. The Pudong skyline looks like it was ripped from the Jetsons, with the bulbous Oriental Pearl TV and Radio Tower looking a bit like a two headed lollipop. On the Puxi side, you can walk the Bund riverside district to get a taste of old Shanghai.