Mae Sai which is about 62 kilometers from the provincial seat on Highway No. 110 is Thailand's northern-most district. Mae Sai borders on Myanmar's Tha Khi Lek marked by the Mae Sai River with a bridge spanning both sides. Foreign visitors are allowed to cross over to Tha Khi Lek market by presenting their passports and paying a fee at the Mae Sai immigration checkpoint. This area is well know about is
a well known shopping market for both Thai and Burma because they are all kinds of products, and everything is so incredibly cheap.