Ακουα Αππία, or Aqua Appia, is an ancient Roman aqueduct that was constructed in 312 BC. It was the first aqueduct built in Rome and was designed to transport water from the springs near Colli Albani to the city. The aqueduct stretched approximately 16.4 kilometers (10.2 miles) and primarily ran underground to protect the water from contamination and evaporation. The construction of Ακουα Αππία marked a significant advancement in Roman engineering and urban planning. It provided a reliable water supply to the growing population of Rome, supporting public baths, fountains, and private households. Its success paved the way for the development of more aqueducts, such as Aqua Marcia and Aqua Claudia.