Built around the 1st century AD, this is one of the most well preserved elevated Roman Aqueducts, is the most iconic symbol of Segovia and the most significant architectural landmark in Avila. Consisting of a simple giant block construction of single and double arch pillars the structure reaches up to 93.5 feet tall.  Using a water house and gathering tank Avila channeled its mountain water from the river Frios, 17 kilometers away, using a 1 degree incline. The aqueducts were preserved and maintained for centuries and incredibly they were used up until the 19th century!