Location is approximate since no location information is attached to the image, but it is known to have been taken near this location.
2546 is the year 2003, since the Thai calendar precedes the Gregorian calendar in 543 years, when the calculation is according to the Buddhist Era (BE)
DDS - Department of Drainage and Swerage
If you can assist in translating the Thai text on the outer ring of the lid, click on the question mark