Try Tom Kha soup#30 of 43 things to do in Bangkok
Thus, Tom Kha Kai is a coconut soup with chicken. Thanks to the addition of coconut milk, the taste of the soup turns out very peculiar and unusual. Yet, it will be even more exotic if instead of chicken you order your Tom Kha with seafood.
Perhaps, this coconut soup together with Tom Yam and Som Tam are the "key" to the Thai cuisine, they represent the national flavor in full, and without them it is hardly possible to judge about authentic Thai cooking in general.