his entire bridge/aqueduct was built by the Romans, and built without using mortar - each stone is simply(!) cut perfectly and laid in place. Take a look at the scale of the thing - those are people in the pictures!

They STILL drive vehicles over it (well, they did in the 1990’s) The top course was an aqueduct, part of a 30 mile, constant slope water delivery system. Simply amazing. No wonder Rome ran the world for 1,000 years.