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The Largest Mail Box in Thailand used to be located at the Bell Tower intersection of Betong. It was built in 1924 as the communication post for the townspeople, with a radio placed on top of the box, and the mail slot below it. At present, a new box and larger box (nine metres tall) has been built and is located at the City Convention Hall (Sala Prachakhom). The new mail box attracts a large number of tourists who come here to take photographs.