The 22 July Roundabout, in Thai called Wong Wian 22 Karakadakhom, is a traffic circle in Bangkok, that was built to commemorate Siam's participation in World War I under the directives of King Rama VI (fig.).

This monarch aimed at strengthening his position at home and Siam's position in the international arena, and has commissioned this roundabout with its small park.

The name refers to 22 July 1917, the date Thailand entered the Great War by declaring war on the German and the Austro-Hungarian empires and sending an Expeditionary Force to France to serve on the Western Front. The lanterns in the park are topped with a wachira (fig.), in reference to King Wachirawut.