Another good place to visit would be Kanchanaburi. You can catch the bus there from the Southern bus terminal. It takes about 2 hours to get there. There are several good guest houses to stay at. I would recommend the Apple guest house and they have excellent food there. Another good guest house would be the Sugar Cane guest house. I like it because it has floating cabins on the river Kwai.

While you're at Kanchanaburi, you definitely want to go see the bridge over the river Kwai and have an evening meal at the floating restaurant.

It is a beautiful restaurant. They have a violinist there and the waitresses are all in traditional Thai dress. The food is good and it's very inexpensive. And from Kanchanaburi you can take tours, ride the elephants, go rafting down the river Kwai in a bamboo raft, you can take a train ride, or you can go out to Erawan falls and see the seven different levels of the waterfalls and swim.