As Nubia, earn six different adjacency bonuses on a Nubian Pyramid - Sid Meier's Civilization VI
Use two cities and the Panama Canal to make 7 contiguous land tiles passable by ships - Sid Meier's Civilization VI
Have your Roman city lose 6 population from one Vesuvius eruption - Sid Meier's Civilization VI
3,830/9,1451,095/1,94556/97
231/1,932160/1,00011/45
859/4,094325/1,0006/15