The World Marker, or the Prime Meridian Marker, holds significant importance for military mapping and exploration. This particular marker is the second of three located in Asia (the other two are in India and Vietnam). It is situated on the Sakhakrang Mountain in Uthai Thani Province. To reach it, one must hike approximately 300 meters from Phra Sihing Phra Boromchanok Chakkri Pavilion. The path is quite steep, so caution is advised during the ascent.