The City Observation Tower in Samut Prakan is located on the grounds of the Old Pahk Nahm Prison (fig.), which due to overcrowding was abandoned in 2001 and made into a public park. It is 179.55 meter high, with the observation deck at around 160 meters. Construction started with a ceremony on 27 September 2012 and since its completion ut has been a major landmark of the province, offering magnificent views of the Chao Phraya River and the Gulf of Thailand. Though white in colour, at night its is illuminated in a variety of changing colours.