Wonders play a pivotal role in territorial conquest in Total War: Rome 2. They serve as natural resources to their owners and serve as incentives for conquerors to pursue.
In all, there are 19 such wonders in Total War: Rome 2 for players to conquer and control, and they are spread throughout the map, from end to end. Check out the map below for the full details.
You can also view them on the interactive campaign map, where they are highlighted in grey, here. It's especially helpful if you need aid in planning out your conquests once the game is out.
Total War: Rome 2 is set for release this October September on the PC.