On half way between PASAR GEDE and the old Solo fort.
If you arrive with the car park at PASAR GEDE, an famos local food market which is also worth a short exploration trip.
While walking towards "Vastenburg" the old Solo Fort after +/-200mtr on half way you'll see and find the Balaikota building
9 mtr on the right side of the main gate check inside the tree, behind an Platycerium alcicorne .
Be carefull don't damage the fern.
The place becomes very busy after Sunset. A lot of motorcycles with muggles meeting along the road. Better you check the cach earlier!
Small note on cache maintenance: klaralotte has offered to assist. Thanks!