I have cities,but there is no house in them.I have forest but there is no trees in them.What am I.

问题描述:

I have cities,but there is no house in them.I have forest but there is no trees in them.What am I.

我拥有城市,其中却没有房屋;
我拥有森林,其中却没有树木;
我是谁!!

map
地图

我拥有城市,其中却没有房屋;
我拥有森林,其中却没有树木;
我是谁?
答案是MAP

海底世界,答案的话是"海洋"

答案是MAP