Here's a link I found to an article about a reporter's visit to Balkh where he found Baba Ku's grave. Some great pictures of taking bong hits there.
http://ajammc.com/2012/04/17/overland-from-yerevan-to-kabul-between-poets-saints-and-madmen-in-northern-afghanistan/
http://ajammc.com/2012/04/17/overland-from-yerevan-to-kabul-between-poets-saints-and-madmen-in-northern-afghanistan/