Chris Leung
I had trouble finding this but in Kallang Wave Mall when you are on L1, head towards the Fairprice Xtra exit on L1 where you come out of Fairprice after you pay. Opposite the exit is an escalator with a sign displaying ‘Yumomori Onsen & Spa (L2)’. Go up this escalator towards Yumomori Onsen & Spa and also the public toilets and the Poststation is in this corridor.