The Tourism Authority of Thailand is, amongst others, responsible for the overall signalisation of tourist sites, with each sign bearing its logo.

The logo consists of a circle with a picture of Wat Arun (fig.), the figurehead of Suphanahongse (fig.), the King's personal Royal Barge, and an airplane with a contrail.

Above the picture is the abbreviation TTT in Thai script (ททท), which stands for Thong Thiaw Thai, i.e. ‘Thai Tourism’.