The area once known as ‘Lal Dighi’ (Red Lake) and later Tank Square, became Dalhousie Square in the 1850s, named after Lord Dalhousie, the British Governor General. It was later renamed Benoy–Badal–Dinesh Bag (BBD Bag) in honour of three Indian nationalist martyrs. This heritage walk offers a fascinating glimpse into Kolkata’s 18th and 19th-century history and architecture. Starting from the Governor’s House (Raj Bhavan), it passes the Treasury Building, St. John’s Church, Kolkata General Post Office (GPO), Collectorate Office, and the Writer’s Building. Next, visit St. Andrew’s Kirk, Old Court House Street, the Old Currency Building, Postal Sorting Office, and Central Telegraph Office. A detour to Wellesley Place (now Red Cross Place) leads to the Great Eastern Hotel, bringing you full circle near Curzon Park.