Allahabad Fort (Hindi: इलाहाबाद क़िला, Urdu: الہ آباد قلعہ Ilāhābād Qila) at Allahabad, Uttar Pradesh, India was built by Emperor Ashoka but repaired by Emperor Akbar in 1583. The fort stands on the banks of the Yamuna near the confluence with the river Ganges. It is the largest fort built by Akbar. In its prime, the fort was unrivaled for its design, construction and craftsmanship. This huge fort has three galleries flanked by high towers.
At present is used by the army and only a limited area is open to visitors. The outer wall is intact and rises above the water's edge. Inside the fort there is the Zenana, Palace of Mariam-uz-Zamani and the 3rd century BC Ashoka pillar and Saraswati Koop as well, said to be the source of the Saraswati river. The Patalpuri temple is also here.
Allahabad Fort is the location of the much revered Akshayavat or "immortal tree." Legends say that if anyone jumps from this centuries-old banyan tree he will attain immortality. Civilians are not allowed to see this tree. It is near the southern wall and is one among many trees that can be seen from outside the southern wall of the fort.
In the fort one railway track comes from Allahabad Railway Station. This railway track was made by the East India Company to use during the war.