What river flows near the Colosseum?

The river that flows near the Colosseum is the Tiber River.

The Tiber is Rome’s main river and one of Italy’s most historically important waterways. It runs through the city west of the Colosseum, eventually reaching the Tyrrhenian Sea near Ostia. Rome itself was founded on the Tiber’s eastern bank, making the river central to the city’s growth, trade, and military importance.

The Colosseum is not directly beside the Tiber. It stands in the valley between the Caelian, Esquiline, and Palatine Hills, near the Roman Forum. That location can cause confusion because an ancient canalized stream once ran through the valley, while the Tiber is the major river associated with the wider area.

The Aniene is another Roman-area river and a tributary of the Tiber, but it does not flow by the Colosseum. The Arno is associated with Florence, and the Po is northern Italy’s major river.