By dennislokawai from a Hong Kong transport forum :
hkia said:Is this the only underground WC in HK?
HK has THREE underground public toilets. The one in this thread is the ONLY underground public toilet which is still in use today and it has a history of over 100 years. I knew another one which is closed now is on the Police HQ on Old Bailey Street, which is between the Old Victoria Prison and SOHO (South Of Hollywood ROad). I don't know where was the third one. :|Skybean said:There should be a few more, but with locked doors...
I thought they shut down many of these things ...certainly a rareity nowadays.