Two Roman bridges from the ancient Via Julia Augusta survive in Loano — remnants of the road the Romans built to connect the Ligurian coast towns. The most famous of these, the Pontetto, is now buried beneath the modern Via Aurelia, testament to how thoroughly later development has built over the ancient route.
The bridges are not a conventional tourist attraction — you cannot stand on them — but they are why Loano's history stretches back further than its medieval appearance suggests. Ask locally and you may find someone who can point out exactly where beneath the modern road the ancient stonework lies.