Open Biblical Places
Search for Achaia to get to "Paul's Third Missionary Journey" map
Note that it zooms way way in to show you Achaia
Now press Ctrl+F and type Caesarea.
The map recenters itself somewhere vaguely over near where Caesarea Maratima is (also called simply Caesarea), but it doesn't zoom in enough to even be able to read the text. And the fact that there's another Caesarea (Caesarea Philippi, not depicted on the map as far as I can see) might be what is confusing it.