Ton Tan Green Market is a 40-rai, garden themed area built just three years ago in Khon Kaen. Ton Tan Market as it is known in Khon Kaen. Located right in the center of the city, it is easily accessible and if you are in Khon Kaen a visit is almost obligatory. The market attracts huge crowds every evening and it is a great place to pick up trinkets and gifts.