Yes, folks. This trap door opens up to a tunnel!
The door can be found in the court room floor of the Ipoh High Court building, and it leads to the Town Hall. During the Emergency, it was used to moved prisoners in temporary lock ups in the Town Hall (which at that time was a police station) to the court house. These prisoners were from the Taiping and Batu Gajah prisons. Today however, there is only a few metres of tunnel left as it has been blocked.