Everybody knows what Mount Rushmore is. One of the most popular tourist attractions in America, it's a granite rockface carved into the shape of four presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt.
Rushmore is set in stone, literally. There have never been plans to add anyone else to the carving. But if more faces were to be added to the monument, who would be a good candidate?
This r/AskReddit thread ponders the hypothetical question: "You get to add another American to Mt. Rushmore, but it can't be a president. Who do you choose?"