Where would i find the itunes media folder?

i was on itunes and i was deleting a purchased song and when i deleted it a window came up. it said do you want to move the selected song to the recyle bin or keep it in the itunes media folder? i the choices were cancel, move to recyle bin, and keep file. i chose keep file.. now where would i find that file? in the itunes media folder but where is that folder? bec now i want that song back.