Standing at approximately 30 meters in height, the Plong Liam chimney has been one of the highest and most prominent structures along the Tha Chin River from the past to the present day, with its octagonal brick design specifically engineered to create a strong draft for exhausting smoke from the sugar refinery high into the air. The fact that this massive chimney remains perfectly upright without tilting after over two centuries is a testament to the brilliant foundation engineering and the strength of ancient bricklaying techniques that support such immense weight. Today, its impressive height serves not only as a landmark for passing vessels but also as a magnificent witness to the grandeur of Thailand's early sugar industry, continuing to awe visitors with its enduring architectural scale.