Correcting my unswer

Thank Rosa's clues, I read some information on Columbus landfall and voyage in order to get rid of plenty of useless information, so I got a conclusion that the country must be American and at the same time it must be some coastal city in the south of North American (USA).

I think that exercises of this kind of photo collage can help us improve our independant reading skills and collecting and arranging information skills, if there is enough time and it is possible, we should do more in the future.