U Thong Ancient City Located along the Sam Phan Crocodile River in the area of U Thong District, Suphan Buri Province, the boundary of the city is defined by a moat that was excavated. It surrounds an oval-shaped flat area, about 2 x 1 square kilometers in size, which found many ancient sites and antiquities spread within the plains of the city.

Surveys and archaeological studies found artifacts such as pottery, stone axes, beads, etc., indicating that the area of U Thong Ancient City Has been used for human habitation since prehistoric times and with the terrain conducive to agriculture Including a prime location with a position close to the sea coast As a result, the city of U Thong later. Progressing solidly on the trade route Both land within the country and by sea to other trading ports in foreign countries, many antiquities evidence Indicates that about 2,000 years ago, U Thong Ancient City had trading contacts with foreign merchants almost everywhere, including India, Greeks, and Romans, etc., who expanded maritime trade to Southeast Asia. (Source: Silpa Arts and Culture -Mag. com).

It is important in archaeology with a story of being an important trading port, GreenValley local partner has established a detailed topographic survey project on the area surrounding U Thong Ancient City using modern technology in measuring elevation and terrain Called the Lidar technique (Lidar: Light Detection and Ranging), the results of the survey reveal detailed topography in the ancient city of U Thong and its surrounding areas. and expanding the ability to interpret geography in the area Both in the dimension of geology and in the dimension of archeology (Chavalit Khao Khiao, 2022).

Picture: Detailed topography of the area surrounding the U-Thong moat was analyzed from GreenValley LiAir data, it shows the elevation difference between the western highlands caused by the ebb and flow of sediment debris from the west side of the area while there are plains on the east side.