The cache is not at the posted coordinates.
To find the location of this cache you will need to complete the Dublin Castle & City Hall set of 5 Adventure(Lab)caches and collect the codes. The Adventure Caches are not far from here.
This bonus cache is available 24/7 - however, the Adventure caches are not.
This Adventure trail will take you around the grounds of Dublin Castle, Dubh Linn Gardens & into City Hall to discover some of Ireland's history & architecture.
Dublin Castle: On this site kings and queens held court, Irish Presidents have been sworn in and old orders have been swept away through rebellion and revolution. Dublin Castle Courtyard is the highest point in Dublin’s center, so was the most strategic point for controlling the territory. There is evidence of a ring fort here as early as the 6th century, a Viking fortress (930), then a stone castle built by King John of England (1204). The Castle served as the seat of British rule in Ireland, from 1204 until officially handed over to Michael Collins, Irish Govt, for the people of Ireland in January 1922.
City Hall: Built as the Royal Exchange, between 1769 and 1779 to the designs of architect Thomas Cooley and is a notable example of 18th-century architecture.
Dubh Linn Gardens: an oasis in the city & where Dublin got her name.
To play the lab caches download the Adventure Lab app to your phone then Use your phone's native QR code scanner to open this adventure in the Adventure Lab mobile app, or share the following URL:
https://labs.geocaching.com/goto/DublinCastleCityHall
Upon completion of each Adventure stage, you will be given a code word for this Bonus Cache .
Once you have all five enter them in alphabetical order into the checker, all lowercase with a hyphen (-) between them, no spaces, thus:
alpha-bravo-charlie-delta-echo
You can validate your puzzle solution with certitude.