I have cities but no houses I have mountains but no trees

I have cities but no houses I have mountains but no trees

I have cities but no houses I have mountains but no trees

Can you solve this what am i riddle?

I have cities but no houses I have mountains but

I have cities, but no houses.

I have mountains, but no trees.

I have water, but no fish.

What am I? 

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ANSWER

A map.