As the IWAI Royal Canal Guide reads: 13th lock, Deey Bridge, had the reputation among the old Royal Canal boatmen of being haunted and they would never moor there for the night.
Some legends say that a canal boat sinked here and all passengers have drowned. There is a poem by Arthur Griffith about the ghosts at 13th lock, and the music group The Spook of the Thirteenth Lock used it as an inspiration for their name.
You can get to the cache site by Dublin Bus no. 66 which stops less than 100m from the lock. There is a street parking available between the main road and the lock as well. Of course you can take a longer stroll along the canal from Maynooth to Leixlip.
The cache is a 0.675 L&L clone container in a black bag. Enjoy!