I'm closing to wiping out an enemy civilization but cannot find their remaining units and cities. How can I do this?
Otherwise you just need to send your units out searching. If you see one of his units, its likely that his city is somewhere nearby, so focus your searching in that area. Keep in mind that to wipe out another civ, you only have to conquer thier cities, so don't worry about hunting down each unit. You should be able to see how many cities they have left by bringing up the diplomacy screen and looking at the section that lists cities they can trade. Capitals can't be traded, so it will be one more than what is listed.