Caesarea
Israel did not possess any good natural harbors so Herod the Great decided to build one on the Mediterranean. He constructed a 200 foot wide breakwater to enclose the harbor so that it was only open to the north. This city took 12 years to build.
Aquaduct
The site chosen for the city did not contain any natural springs or rivers, so it was necessary to have fresh water transported down the coast along several aquaducts.
The aquaduct ran down from Mount Carmel from the north and supplied the city with fresh water.
Crusader Gate
Most ancient city gates contain only the foundations, but this full crusader gate gives some idea of what the earlier gates looked like. The gates of those ancient cities contained a number of large chambers and were regularly used to conduct both the business and even the social life of the city.