Tree sculpture: (see more info in Hysse's log)
It is always fun to look for nice number combination for a number freak as me. While searching for A Pair of Quintuplets, I found one in the middle of one of Oslo's nicest and most urban parks - St. Hanshaugen. And I decided to take you on a tour of the park 
The park is used by lots of people through day and night - be discrete and careful during your hunt.
Links to more info on St. Hanshaugen (in Norwegian):
St. Hanshaugen: Ingenmannsland som ble folkepark and Friluftskonsertene
Coordinates point to first leg, not where cache is located. Final coordinates updated 28/1-23.
This multicache is also made up by quintuples. To find the coordinates for the main cache - you first need to stop by 5 locations in the park during your short and nice stroll, while you find the answers to these questions. Then you should be able to calculate where the cache is hidden.
The cache is a small log-only micro box - with no pencil.
You can validate your puzzle solution with certitude.