Chennai is a city in India. It's often called the "Gateway to South India" because it's the biggest city in the southern part of India. It's a big port city on the eastern coast of India and is a popular tourist destination. Chennai is also home to many different kinds of people, so it's very interesting to explore! There are lots of different things to see and do in Chennai, like visiting museums, temples, beaches, and archaeological sites. It has a lot of great food too, so it's a great place to visit if you want to try new foods!