Riddle Me This (Part 2)

The wind blows through my leaves

Revealing the continents,

The islands, the oceans, the seas.

And then, as if a giant spider had come
And laid its web down across the globe,
My leaves divide the land with rivers and lines.

As if you were old and sitting on cheese
I contain the whole world for you to see,
Its contours and surfaces and curves,
Its divisions and states and nations.