Located at a very popular swimming point area in "Una River".
You have to access the river.
It is better to access during weekdays.
After a short and easy trail you will go downstairs and you will arrive at the river main swimming area. there is a lot big rocks nearby.
The waterproof geocache container is underwater (about 50cm / 0.5m / <2 ft deep) among rocks in the left.
When you see to the right you are going to see really big rocks but to left it is not too big.
See photos for better understanding.