Ancient Roman architecture of being in their houses, as they instead would go to public baths, and engage in other communal activities. Many lighthouses were built around the Mediterranean and the coasts of the empire, including the Tower of Hercules at A Coruña in northern Spain, a structure which survives to this day. A smaller lighthouse at Dover, England also exists as a ruin about half the height of the original. The light would have been provided by a fire at the top of the structure. All Roman cities had at least one thermae, a popular facility for public bathing, exercising and socializing.
Ancient Rome aid in their agriculture. By the third century, the city of Rome was supplied by 11 aqueducts with a combined length of . Most aqueducts were constructed below the surface, with only small portions above ground supported by arches. Sometimes, where valleys deeper than had to be crossed, inverted siphons were used to convey water across a valley. The Romans also made major advancements in sanitation. Romans were particularly famous for their public baths, called "thermae", which were used for both hygienic and social purposes. Many Roman houses came to have flush toilets and indoor plumbing, and a complex sewer