两则英语谜语（简单．关于动物的）

No.1
I have forests with no trees.
I have cities with no houses.
I have rivers with no water.
What am I ? ( )

No.2
Two little boats without any sails.With passengers on board.
They don't go on the river or sea . But travel on dry land.
In the day the boats pass to and form.
But at night they are both empty.
What are they? ( )