World's 5 busiest ports

Singapore
The world's largest container transshipment hub, Singapore, handles about one-fifth of the world's total container shipment. In 2007, Singapore Terminals handled 27.1 million twenty-foot equivalent units (TEUS) of containers.
The port of Singapore operates 4 container terminals and 2 multi-purpose terminals in Singapore, and links shippers to an excellent network of 200 shipping lines with connections

Rotterdam, Netherlands
Rotterdam is Europe's largest logistic hub. The port is the gateway to a European market of 450 million consumers. More than 500 scheduled services link Rotterdam with over 1000 ports worldwide. The port has a depth of 24 metres (75 feet). The port and industrial area stretches over a length of 40 kilometres and covers 10,000 hectares. Rotterdam is also Europe's cheapest bunker port. One of the main advantages of Rotterdam is its location on the estuary of the rivers Rhine and Maas. This helps to transport goods economically to other regions in Europe.

South Louisiana
The Port of South Louisiana, which stretches 54 miles along the Mississippi River, is the largest tonnage port district in the western hemisphere. Over 4,000 vessels and 55,000 barges call at the Port of South Louisiana each year, making it the top ranked port in the US in terms of total tonnage.

Shanghai
The Port of Shanghai, located in the vicinity of Shanghai, comprises a deep-sea port and a river port. In 2006, with a total of 537 million tonnes of cargo transported, it became the world's busiest port by cargo tonnage for the first time. The Port of Shanghai is situated at the middle of the 18,000km-long Chinese coastline and is an important gateway for foreign trade. The Port enjoys a good geographical location, modern infrastructure and facilities.

Hong Kong

The port of Hong Kong, located by the South China Sea, is a deepwater seaport dominated containerised products' trade. The natural shelter and deep waters of Victoria Harbour provide ideal conditions for berthing and handling all types of vessels. It is one of the most busiest ports in the world, in terms of cargo handled and passengers carried.