Also known as a "baht bus" or a "red taxi", it's one of the cheapest way to travel in
Thailand. You can get on wherever you want and get off wherever you want, and it seldom
costs more than 20 baht. Songtaews are particularly plentiful in Chiang Mai and Pattaya.
In the background of this photo is the city wall as seen from inside the old city.
Chiang Mai, Thailand