Shah-i Mashhad lies at 35º 02' lat. and 63º 59' long. at the upper Murghab river in the Afghan Province of Badghis, District Jawand near the confluence of the rivers Kucha and Murghab.
Click on the following link to see the location of Shah-i Mashhad on a Google Maps stallite image.
Unfortunately the building cannot be seen on the image, but the site is recognizeable:
On this image you see the Murghab River coming from the Northeast, and after the confluence of the Kocha, which comes from the South, the Murghab continues towards Northwest. If you follow the Murghab downriver from the Kocha's green delta, after about 2000m you come to the site of Shah-i Mashhad on the left bank of the Murghab (on the down left corner of the image there is a rule with meters and feet). The site lies on a yellow-brown patch between two green areas in the middle of a long bow of the river that spans in northwestern direction between two u-curves.