The Documents folder is situated at C:\users\yourname\documents However the document folder isn't static. You can now move it to wherever you like.
To move the Document folder proceed as follows:
1/ Right Click the Document folder and, from the drop down menu, select Properties
2/ In the Properties window, Click the Location tab
3/ In the default setting dialog box you will see the current position of the documents file, i.e., c:\users\John\Documents
4/ Just below the location dialog box you will see three buttons:
5/ Click the Move button
6/ The select a destination window opens
7/ Select a destination for the Document folder and then Click the Select Folder button
8/ You will now be taken back to the documents properties window
9/ Next, Click the Apply button
10/ A message will now appear saying 'Do you want to move all the files from the old location to the new location'
11/ To continue, Click Yes
12/ The documents folder, along with all of its files, will now be moved to the new location