Romans are known for their architecture, from the Colosseum to The Pantheon. Another highlight of the Roman era were their water management systems. Romans have built aqueducts to transport water over long distances. The first aqueduct was built more than 2,000 years ago - the Aqua Appia built in 312 BC supplied water to public baths, fountains, households and other urban facilities. But problem arose when the destination was on a higher ground.
Water naturally flows downhill due to gravity. For aqueducts, Roman engineers generally relied on gravity, building channels with carefully calculated gradients so that water could flow naturally towards settlements. But to send water to higher grounds, Roman engineers use various other methods.