Allahabad Fort (Hindi: इलाहाबाद क़िला, Urdu: الہ آباد قلعہ Ilāhābād Qila) at Allahabad, Uttar Pradesh, India was built by Emperor Akbar in 1583. The fort stands on the banks of the Yamuna near the site of confluence with 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 Akshaya Vat (Hindi: अक्षय वट, Urdu: اکشے وٹ) which mean immortal tree. Legends say that if anyone jumped from this centuries old banyan tree he would attain immortality. Civilians are not allowed to see this tree. It is near the southern wall and is one among the many trees seen from outside the southern wall of the fort.