Akbar built this fort in 1583 on the bank at the confluence, on a scale that made it one of the largest he raised. It stands directly over the Sangam and its walls are visible from the water.

The fort is held by the Indian Army and the greater part of it is closed to the public. Access has historically been opened around the Kumbh, and a limited section containing Akshayavat and the Patalpuri temple has been made available at certain periods.

An Ashokan pillar stands within the walls, carrying inscriptions from the third century BCE alongside later additions — including one of Samudragupta and one from Jahangir's reign.

Anyone planning a visit should confirm the current position first. Access arrangements change and are not published on a fixed schedule.