Royal Insurance Building

Notable for its imposing high domed roof (rising over 220 ft) and tall Ionic-Corinthian pillars. It was built in 1868, at the site of the old Fort William, and has remained an important landmark of the city ever since.

A philatelic museum beside the GPO, housed in the ground floor of a red building. It is dedicated to the history of postal services and the contributions of runners, who delivered mail from one place to another. The museum has a collection of various knives that the runners carried for self-defence. It also has a wide collection of stamps and letters, along with a signature of Rabindranath Tagore on his Santiniketan passbook. There are also signatures of CV Raman and portraits of many other individuals who once worked for the Indian postal service.

One of the few museums in India that covers the evolution of money in the country, from the earliest barter system and the use of cowries to paper money, coins, stock markets and modern-day electronic transactions. It is hosted in the old building of the Reserve Bank of India.

The landmark administrative building of Kolkata, designed by Thomas Lyon in 1777. It originally served as the principal administrative office for writers (junior clerks) of the British East India Company (EIC). The building became famous for its involvement with three youngsters who dared to challenge the British rule in 1930. Since India's independence in 1947, it has housed the office of the Chief Minister, cabinet ministers and other senior officials.

Contains a heritage gallery.

A neoclassical heritage building, with its ground floor housing the Asiatic Society's rare foreign journals and manuscripts section, while the first floor houses offices, exhibition galleries, and a sales counter of the Archaeological Survey of India (ASI). It preserves the rich legacy of music, painting, theatre, and cinema of Bengal. There are photos and hand-drawn posters of old Calcutta on the walls along the stairs. The exhibition gallery features old images of docks, College Street, Durga idols, etc. It also has dedicated corners for old Bengali films, theatres, and instruments.