I never had a shower available as cold as you @kus-knee, happens to be my area of Aceh, Indonesia had a few tourist attractions, one of the attractions which have the coldest place is Takengon, Central Aceh district Capital, if you want @kus-knee could go on vacation to the city of Takengon. Indeed the famous area is the island of Sabang in Aceh, but if you go into the Takengon and Fresh Sea surrounds you will greatly enjoy it.
Regards
Thanks for the lovely photos!