The Cache
The 35th cache in the BRPT is placed along Coliemore Road in between two magnificent houses. The one closest to the water is named after the castle where the Ghost of Hamlet appeared. You are looking for a 2-inch long magnetic container.
The Blackrock Power Trail Series (BRPT)
The series started its life in Idrone Terrace on Dublin Bay behind Blackrock Village and has now spread both north-west and south-east from the original Cache. .
Good hunting!