Every day finished goods and commodities are transported by sea in shipping containers from one port to another across the globe. Standard shipping containers measure 20 feet long by eight feet wide, hence they receive the name of “Twenty-foot Equivalent Units” or TEUs.
The largest port in the world is in Shanghai (China) which saw a volume of 31.74 million TEUs of cargo freight passing through its port in 2011. Shanghai is followed by Singapore (Singapore) which saw a volume of 29.94 million TEUs passing through its port for the same year. Singapore is followed by Hong Kong, Shenzhen (China), Busan (South Korea), Ningbo, Guangzhou, and Qingdao (China), Dubai Ports (United Arab Emirates), and Rotterdam (Netherlands), all in the top ten.
For the interactive map, that allows you to explore each one of the largest 50 ports in the world, visit: The Smithsonian: Interactive: The 50 Largest Ports in the World