In ancient times, Cologne was supplied with fresh water from the Eifel region by one of the longest aqueducts in the Roman Empire. The section in the garden area of the district government serves as a showcase for this technical masterpiece of Rome's engineers.
The almost 100 km long water pipeline was capable of transporting 20,000 cubic metres of fresh Eifel water from the area of present-day Nettersheim to Cologne. After the fall of the Roman Empire, the water pipeline could no longer be maintained and deteriorated in parts. This led to a considerable deterioration of the water quality in the city. From then on, drinking water was obtained from wells. It was not until the 19th century that a functioning, modern fresh water and sewage system was built again.
Today, a hiking trail leads along the Roman aqueduct. In addition to visiting preserved sections of the Roman fresh water pipeline, the hiking tour is characterised by its beautiful landscape.