Kolkata is a city where its rich culture harmonizes seamlessly with the chaos. A journey to Kolkata will take you back to the colonial India. It's a treat for the foodie in you too. Sunderbans, the world's largest mangrove forest is just 100 kms away from the city. Home to the Royal Bengal Tiger, one needs to spend at least two days there to catch a sight of the mighty creature. The forest is home to various other endangered species as well.