It's common knowledge that the Romans were quite the industrious group and that they are renowned for their engineering marvels. Are any of the sewers, aqueducts, roads, bridges, etc. built by the Roman empire still in use anywhere around the world? How does this infrastructure stand up to the stress of the modern world? And are there any historical records of people throughout the centuries after the fall of the Roman Empire preferring to use Roman infrastructure rather than the building techniques of their time?
There's a Roman bathhouse still in use which is located in Khenchela, Algeria, although it has had some repairs which is to be expected.
"The Romans built them, before Jesus," shouted one man, shampoo bottle in hand. Another piped up: "But they were damaged in an earthquake and that's when the Ottomans came and repaired it."
Only the more recent Ottoman brickwork, the newly constructed changing room doors and the numerous brightly coloured plastic buckets gave the game away.
The Roman Baths in Bath, England had been used until in the last century. http://visitbath.co.uk/spa-and-wellbeing/history-of-baths-spa N.B. The upper part of the building was rebuilt in the 1800s.
The Amphitheatre of Nimes is used to this day for events such as concerts.
Some of the Cloaca Maxima (Greatest Sewer) in Rome is still being used as well. http://books.google.co.uk/books?id=5Gfk34wJ8-kC&lpg=PA174&ots=uw8Ia1xDJ0&pg=PA174#v=onepage&q=Cloaca%20Maxima (page 174)
Roman roads from Britain to North Africa to Palestine are still in use today. Of course they have been maintained/rebuilt since they were built (in the past century to accommodate automobiles.)
Many Roman aqueducts have been restored or maintained over the years and are still very much in use. A great example is the Aqua Virgo^^[1] right in Rome. Although no longer used for drinking water it is still the source for many fountains including the Trevi Fountain.
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