How did Roman cities sink?
How did Roman cities sink? Over several centuries, bradyseism, the gradual rise and fall of the Earth's surface caused by hydrothermal and seismic activity, caused much of the city to sink into a watery grave, where it still sits today.
How did Romans get water uphill?
Although Romans sometimes used pressurized siphons to allow water to travel uphill, they were more likely to redirect water sources to sloping land, even if it was many miles away! Their layered, arched bridges filled deep valleys, and water ran across the top in the open air.