This is, at the time of listing, the only Wherigo in Vietnam. The cartridge is made by -Waldmeister- and can be obtained via this link.
-Waldmeister-'s "The first Reverse Cache [WIG]" is the original cache of this type.
Your goal is to find the cache by checking your "Reverse Cache"
for the distance to the end cache. Additional instructions can be found in the wherigo cartridge itself. The cartridge can be selected in several languages.
The number to use are:
712186
902815
039255
Please notice that the cache is located at the premises of the mall, so the cache is only accessible during their opening hours.