Where do pine trees come from?

Everywhere!! :)

According to: http://www.2020site.org/trees/pine.html

They range: from the Northern Hemisphere from Borneo and from Mexico to the Arctic Circle.

The Stone Pine trees may perhaps be a native of China, where it is plentiful, as in the south of Europe. It occurs in the south of France, in Spain, in Greece, and in Barbary; but it is most closely associated in our minds with Italy.