Greece

The street map on its own isn't particularly helpful You might want to listen again to what Professor Simos said about his profession. Maybe the periodic table will come in useful again..?
The professor said that being a scientist was a 'noble' profession. Which elements on the periodic table are known as the noble gasses? Search on the internet if you are unsure. How might the information on the periodic table link with the street map?
The atomic number of each of the noble gases forms the co-ordinates needed to navigate the street map. Let's take a non-noble element as an example. Boron has the atomic number 5. This would create the co-ordinate 0, 5. Nihonium has the atomic number 113. This would create either 11, 3 or 1, 13.
If you follow the co-ordinates revealed by the atomic number of the noble gases, what do you see in each square?