Where is the best geographical location for an oncologist?

== == That would probably depend upon what you mean with "best". If best means, that you want to help as many people as possible and would thus like to chose the region with the most cancer patients Chernobyl might be the geographical location of your choice. If you just want to make as much money as possible you would probably chose to settle down in the US, as patients are charged more for their treatment then anywhere else. If you like the easy life you might think about going to an Arab country and have the royal family pay you a considerable income for not doing much.... If you like bureaucracy and have masochistic tendencies, Germany might be your pick, since you will send more time filling out forms for the public insurances than anything else.