Kolkata...one of the most interesting things about Kolkata are the various modes of transport. It was the first city in India to have a modern Metro. And it is probably one of the only ones to continue to operate a tram. It has a circular rail. Kolkata has the largest transient population in India - so a lot of people take local trains to arrive into the city. Then there are people staying on the other side of the river (Ganga), who take the ferry to cross the river. Apart from Taxis, Autos, busses, and regular Rickshaws, some of the older parts of the city still has hand drawn rickshaws.