I recently went to Ayutthaya by train as a first time Thai train traveler. First of all, the website for the trains do not list the correct times. Secondly, trains are not punctual. You must be switched on because 3rd class inter city trains stop in each city so even with the windows rolled down and the small oscillating fans, you probably won't be cooled off. 15 baht from Bangkok to Ayutthaya. Photo report coming soon.