Thailand is a country with a mixture of a diverse culture and even more diverse landscapes with mountains in the north and gorgeous beaches elsewhere. Travelling through the country can lead you from the busy metropolitan city of Bangkok to more serene, peaceful areas with hardly a soul anywhere.
Travelling around Thailand is very easy due to the country having a well equipped bus and rail system as well as internal flights if you wish to get there quicker. You can of course hire a car for your trip if you are exploring the country and not just staying in the one place. However, the driving there is a bit more chaotic than usual. It is certainly advisable to not hire a car if you have had no experience of these conditions before.
Thailand is really seen as a backpackers delight. Accommodation can cost next to nothing yet it can be located in the most stunning of places meaning you can wake up to a view straight from paradise. The food, especially off the beaten track, can also cost very little however you might have to be a bit more adventurous in trying things but this is not really different to other countries in the Far East.
The main, and most popular, destinations are Bangkok, Phuket, Pattaya, Chiang Mai, and Koh Samui with these spread over the country. Indeed Phuket is one of several islands off Thailand and you can then find Chiang Mai in the north of the country in the more mountainous area. But if you are not pushed for time then travelling between the places can let you see what life is like for normal Thai people.
Places such as Bangkok have all of the tourist lights and are geared up for people from all over the world and indeed the prices of food and accommodation in Bangkok can be significantly higher than other places. For Bangkok it is certainly best to do your homework first as it can save you a lot of money. You are therefore best to check out what others have said and go with the general consensus before finally booking where you are going to stay.