A one day trip to one of the famous and unique place in South India have more to offer than just a divine temple. It's an 8-hour journey from Chennai to Karur and you can easily book a ticket from Perungalthur(Chennai) to Karur.
The roads are awesome and you can enjoy the scenic beauty just by sitting in your bus. It was an overnight journey from Chennai and I reached around 8 in the morning. There are many hotels near the bus stand, depending on your budget, I think there is a room for every budget domain.
Enjoy South India food, spend some time in Pashupatheeswarar Temple and then explore streets.
Weather is hot, really hot there. So you must take your sunglasses, polyester clothes and a hat to make yourself comfortable in that area.
Do chekout the place and explore more.