Im doing geography, history AND politics so I have to learn so many facts and figures. I personally do not like geography but if you interested in the subject you should take it. If you are interested in both I would go for it because it makes things a lot easier to learn, even though there is a lot. A lot of geography questions are also common sense and if you have good exam technique then you a guaranteed quite a number of marks. Geography and history is quite a common combination in my school so a lot must think the same as me and believe it is doable.
N.B. I got an A* in both geography and history and study a language which is not near as much work in my opinion. (just noticed you said you are thinking of taking Spanish)