The cache is not at the posted coordinates.
This is the bonus cache to Adventure Lab Sanur Seaside Sites. If you have completed the series from South to North, you will find yourself continuing North passing by these coordinates on your way to the Bonus anyway. If you decide to come back to do the Bonus final on its own, you will find ample parking here and another lovely Sanur Seaside stop! In that case, I would recommend doing it for sunrise adventure to experience the most beauty of this site. You could then also carry on further North to the most excellent cache on East Bali: GC810DA
'Pantai Matahari Terbit', literally translates as 'Sunrise Beach' and this really is one of the best places on Bali to watch the sunrise. Views like this are probably why Sanur is often referred to as "The Morning of the World"!
Sanur Seaside Sites Adventure Lab takes you on an eclectic tour of 5 unique installations and institutions on the long stretch of white sand beach of Sanur's seashore. All locations are within a 5km radius and the whole adventure should take you no more than 2 hours walking (or cycling). Although the locations do not have to be visited in order, it makes sense to work from S to N.
Upon completing each of the 5 locations of the Adventure Lab you should have received a code letter. Unscramble the anagram from these 5 letters and enter it into the Certitude geochecker to receive final coordinates of this cache.
You can validate your puzzle solution with certitude.
Good Luck and Happy Caching!