During years, the city developed and extended only towards inland, due to already existent military and industrial installations that constrained the civilian expansion. The unique branched conformation of natural harbour of Brindisi is the effect of the erosion corresponding to the mouth of water streams: Cillarese channel that nowadays ends into West Cove, and Palmarini-Patri channel that ends into East Cove; they formed a river valley that subequently was flooded by the sea.In the past there was a third "branch" of the inner port, called Mena Channel, that was closed and filled up during XVIII century, nowadays corresponding to Corso Garibaldi. In the past, other two channels ended in the medium port; in the Middle Age they were named Delta and Luciana, and afterwards known as Fiume Grande and Fiume Piccolo. They are still visible in the nearby of industrial area, and are interesting naturalistc resources.
In East Cove of Inner port there are ten active docks, including Santa Apollinare, Punto Franco, Feltrinelli, Carbonifera, Dogana and Centrale.
In the Medium port, mainly dedicated to commercial traffic, there are the docks named Costa Morena and Punta delle Terrare.
In the External port there are the industrial docks.