North of Greece - panoramic landscapes

the international driver's license translates your US driver's license to the language of the county in which the police are requesting to see your license, so you will most likely need one for Greece. Do not be fooled by numerous websites that offer expensive international driver's licenses, go to AAA and buy one for $20 ish...

Correction to the post above. It's an International Driver's Permit (IDP) that you need; there is no legitimate International Driver's License. Yes, it is required for Greece. Furthermore, unlike some countries where they don't ask for it at the rental office but you will need it if stopped by police, in Greece there are multiple reports that car rental agencies need to see it, so without one you probably won't get a car.

As stated above, you get it at a AAA office, and do not need to be a member (members get a slight discount). It's good for a year, but you can start the year any day you wish.

If you do a search here for Thessaloniki, you'll see several positive posts, like these:

https://community.ricksteves.com/travel-forum/food-drink/has-anyone-of-you-been-to-thessaloniki-city-in-greece

https://community.ricksteves.com/travel-forum/to-the-east/thessaloniki-what-to-do

I've rented eight cars in Greece since June 2014 and have not needed an IDP at any of them (which is good, because I didn't have one). I did volunteer work with people of other nationalities, though, who did require one. Regardless, getting one at AAA is easy and cheap, though I don't think you'll need it.

I realize this isn't a panoramic landscape, but if I were in that part of Greece I would visit the the Royal Tombs of Aigai (Vergina), which include the tomb of Philip II of Macedon, Alexander's father. The tomb was undisturbed and contained some incredible finds.