As my fellow doppler Santosh said a few excellent points about historical importance of Kochi. I would like to add to it the modern day beauty of Kochi.
Kochi port is one of Indias biggest ports and the most technologically advanced. The airport of Kochi is located in Nedumbaserry which is again one of India's finest. the city itself is connected to almost all the major cities by air, rail and roads.
The little city of Cochin is always bustling with people and there are a lot of places to visit for everyone. Are you a nature guy/gal, a city dweller, a mall shopper or a beach lover or someone looking for beautiful churches to visit? Then, Kochi is the place you need to be which caters to everyones needs!
If you are planning to come to India, Kochi should be on your plan!