Unicorn Falls
This cache is not located in a National Park - but you will have to visit one to find it.
Mount Jerusalem National Park. Where's this you say? This little piece of promised land is located between Mullumbimby and Uki. You can drive from one side to the other - there is a dirt road, which can be bumpy but 2WD cars will have no problems. Unicorn Falls are located in this National Park. There are several swimming holes, connected by flowing cascades and lots of spots up and downstream that offer places too cool down.
To find the final cache, which is located outside of the National Park towards the Mullumbimby side, you need two pieces of information.
WP1 is where you walk from the main road into the falls area. There is a number of huge logs being used as a barrier so cars do not drive in here. How many logs are there. Let this be A
WP2 is just down a bit. There's a tree where some young lovers recently decided to let the world know about their passion for each other. WP2 points to a tree with the following etched into it:
? + ?
2 0 1 8
♥
Where the question marks are above, convert each initial into the number at which position thie initial is in the alphabet (e.g. A=1 B=2, C=3 etc). Let these two numbers be B & C.
Now, once you have played around in the water for long enough, it's time to find GZ. It's at:
S28° 29. C (A-2) (B-A) E153° 23. (A-1) (C-1) (C-4)
Checksum = A+B+C=13
GZ is a short drive away at another nice spot to swim. You're looking for a small clip lock container with some swaps.