Shrine of Bayazid Bostami

The interior of the mosque is sparsely decorated, while the mihrab on the qibla wall (indicating the direction of Mecca) has an identical projection on its opposite side.

Overwhelmed by their love and devotion, Bostami pierced his fifth (little) finger, allowed a few drops of blood to fall to the ground, and permitted his followers to build a shrine there on his name.

Although there is no authentic historical record about Bostami's visit to Chittagong, some 18th-century Bengali poets remembered a Shah Sultan of Nasirabad in their poems.

Legends claim that these turtles are the descendants of evil spirits that incurred the wrath of the renowned saint, Bayazid Bostami, while he was visiting the area.

At present, the shrine's caretakers – the Mazar Committee – protect the turtle population but will not allow specimens to be taken anymore, regardless of whether they would be killed or reintroduced into the wild.