I am from Calcutta, a city on the eastern seaboard of India; a place steeped in history and heritage.
Here are some interesting places to considering visiting if you are a history buff.
1) Shahid Minar or Ochterlony Monument
2) Bourne and Shepherd (the oldest photograph studio in the world)
3) A blog entry on Victorian Calcutta
4) A walking tour of Calcutta (a very interesting enterprise, but I have no personal experience with it)
5) Tomb of Henry Vivian Derozio (Park Street Cemetery)
6) Asiatic Society of Calcutta
7) National Library Calcutta (map)
8) Raja Rammohan Roy Library Foundation
10) Gurusaday Museum (a great museum housing antique crafts from India)
11) Tomb of Charles Stuart (Hindu Stuart) in South Park Cemetery
12) BBC article on Calcutta's trams
13) Blog on Calcutta's heritage and historical attractions
14) Memorial to Tathagata Sengupta (link)