This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2016 census indicates that No Religion and Jedi Knight are the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
A little history
Undalya is a Aboriginal word for water holes, little is known other than in 1859 a local farmer sold one quarter acre for a Bible Christian Church. The church was built in 1859 and the next year a school was commenced inside it. Both were open for nearly 100 years. Today the building is part of a private residence
To find the cache
On the gate is a number plate = ABCDEF
A street address = GH
S34 04.D(E+F)(G+h) E138 41.(A-H)GC
Checksum = 22
Happy hunting!!!