Olbia's Roman aqueduct is not a single impressive monument but rather a scattered set of remnants that speak to the scale of ambition the Romans brought to their Sardinian port. The city in its heyday was substantial enough to require an engineered water supply; the aqueduct brought fresh water from distant springs to serve the docks, public baths, and private houses of what was then called Olbia.
The most visible remaining sections are low walls and channel fragments that appear unexpectedly among modern streets and building plots. The Museo Archeologico explains the system in context and shows finds associated with the Roman hydraulic infrastructure. For most visitors, the museum exhibit is more informative than seeking out the in-situ fragments.