The Grand Harbour, also known as the Port of Valletta, is a natural harbour on the island of Malta. It has been substantially modified over the years with extensive docks, wharves, and fortifications.

A harbor, or harbour, is a sheltered body of water where ships, boats, and barges can be moored. The term harbor is often used interchangeably with port, which is a man-made facility built for loading and unloading vessels and dropping off and picking up passengers. Harbors usually include one or more ports. Alexandria Port in Egypt is an example of a harbor with two ports.