Kolkata is the cultural capital of India, located on the eastern part of the country along the Hooghly River. It has a subtropical climate with hot summers and mild winters. Kolkata was formerly the capital of British India and is now a major commercial and industrial center known for its colonial architecture, vibrant culture, and festivals like Durga Puja and Eid. The metro area is home to over 14 million people and is well connected by air, rail, and road to other parts of India.