The only metro city in India that has held on to its old-world charm, Kolkata has plenty of incredible travel experiences to cherish as lifelong memories. Yes, there is the Hooghly River, the Howrah Bridge, Victoria Memorial et al. These tried and tested landmarks must certainly be on your bucket list. However, you could also follow a different trail and discover the city's best-kept secrets. Here's a list of five off-the-beaten-track things to do when you are in Kolkata next.