When the Roman army reorganised the Danube frontier after the wars against the Marcomanni in the later second century, a legion was posted here, the Second Italica, with a base large enough to hold several thousand soldiers. Fortresses of this kind were laid out to a standard plan, a rectangle with rounded corners, four gates, a main street and a headquarters building at the centre, so a soldier transferred from another province would know where to find the bath house without asking.
The Danube lies just north, and the river was as much a part of the defence as the walls. Patrol boats moved up and down, watchtowers were strung along the bank, and the traffic of goods ran in both directions. Lauriacum later became the capital of the province of Noricum Ripense, a sign of how important the frontier region had become. The best-known figure from this world is Florian, a Roman official said to have been put to death here around the year 304 for refusing to give up his faith, and thrown into the Enns with a stone around his neck. He became a patron saint of Upper Austria and of firefighters, and many village churches carry his image with a bucket of water.
What remains is subtle. Parts of the fortress walls were found under the town and some are shown in the local museum, while the shape of the camp survives in the street pattern, a quiet echo of a Roman plan. Few visitors come with high expectations, and that suits the place. It is a fine example of how history is often not a monument but a trace in the layout of a town.
The riding is straightforward: flat roads along the Danube plain, a short hop to the Autobahn, and quieter lanes through farmland if you prefer. Enns has everything practical, with fuel stations on the main roads, bakeries in the centre and cafés on the square. A few kilometres east lies the Enns river mouth, where the clear, cold water of the mountain river meets the broad, slower Danube. Spring and autumn are the best seasons, when the light is soft on the fields.