A lot of old estates and tasteful parks are laid out along its riverbank.

Sections of the Bille which flow near or inside the Sachsenwald forest are protected by the Billetal nature reserve.

The Bille is one of three rivers which flow through the city of Hamburg, the other two being the Elbe and the Alster.

The upper Bille drains a wide catchment area with many brooks and small stretches of water.

Main tributaries are the Corbek feeding the Bille near Witzhave and the Schwarze Au at Aumühle, having drained wide parts of the large Sachsenwald forest.