Fort William is a fort in Calcutta, built during the early years of the Bengal Presidency of British India. It sits on the eastern banks of the River Hooghly, the major distributary of the River Ganges. One of Kolkata's most enduring Raj-era edifices, it extends over an area of 70.9 hectares.
The fort was named after King William III. In front of the Fort is the Maidan, the largest park in the city. An internal guard room became the Black Hole of Calcutta.
Wikipedia https://en.wikipedia.org/wiki/Fort_William,_India
Address Khidirpur Rd Calcutta, West Bengal, India
Coordinates 22°33'26.767" N 88°20'16.879" E