The dakshina skandha (right shoulder) of the Goddess fell here.
Khanakul is about 90 kilometers from Kolkota. Locally, the temple is known as Anandamayee temple.
Please note that Mahamaya Devi Mandir at Ratnapur in Chattisgarh also claims to be the Shakthipeeth. Many also claim the spot is at Chennai. No particular temple is sighted.