Bangkok Boxing Camp, Onesongchai Institute of Muaythai is the best spot for beginners and professional fighters. Situated in the center of Bangkok, Bangkok Boxing Camp is next to Bangkok Boxing Stadium where professional Fights take place every Sundays. The camp is now welcoming foreigners to train or learn Muay Thai.

Great resource - history, training, techniques, pictures, videos.

After the World Muaythai Council was established, the members asked Thailand to build a muay thai school under the ministry of education and prepare the curriculum for muay thai. The aim is to promote muay thai and to provide an international standard for learning.
Located in Rangsit, Thailand.

Muay Thai Boran is the mother of martial arts from which the recent sport from combat appreciated by now in the world and known has been developed in times with the name of Thai Boxing.

Comprehensive resource of Muay Thai, techniques.

This video shows you the 30 important moves in thai kickboxing.