4: Neuschwabenland
This stretch of Antarctic coastline is special in this list, in so far as it doesn’t have any actual archaeological findings reported, but it is subject of some conspiracy theories and modern legends. Why? Simple answer. Nazis. The Third Reich lead an Antarctic expedition here in 1938/39, the results of which were lost in the war. This, along with the great level of secrecy which this expedition took place under, lead to a number of legends and conspiracy theories.
One of the most popular ones says that instead of committing suicide or surrendering to the Allies, the Nazi leaders fled to Antarctica, where they had supposedly discovered the entrance to the hollow earth. Even without the Nazi elite having fled here, a game where the Nazis actually found something, be it the Mountains of Madness or the entrance to the Holllow Earth, would be pretty neat.