Dragon Descendants Museum in Suphan Buri operates a two-tier pricing model;


Visited a month or so ago and thankfully there was a promotion of 150THB for everyone, as it was not even worth that for anyone who is not fluent in Thai.
Being that it is all in Thai, English (or other) speakers need to use an MP3 player and headphones. My headphones didn’t work properly, and my player kept dying. Audio from the Thai exhibit is so loud, you can’t hear the English through the headphones anyway. Why foreigners are expected to pay more to enter this museum, and get a poorer experience is beyond me.
The Tourism Thailand website seems to change the price dependent on the language selected (per screenshots below).