Aquaducts

Time for a very short history lesson that is mostly factual. In the second century AD, the Romans built a 56 mile "pipeline" to bring fresh water into Rome. They are known as the Aquaducts. If you're like me, you've heard of them, but they fall into the same class of knowledge as what happened to Jesus between the manger and the wedding with the cash bar. It's interesting but just not worth looking into.
The first picture is of a still functioning aquaduct, while the second picture shows ruins of a second duct. It is also a bonus lesson on perspective since I am actually not as big as the aquaducts.
I continue to be impressed with what the Romans were able to build with little more than (slave) labour and a good understanding of math.