Unfortunately, as is the case with many rules, this one has been broken, and on more than one occasion. The first time Holy Ground was desecrated was in the ancient city of Pompeii, in AD 79. The immortal who defiled the consecrated ground in this manner was utterly destroyed by the eruption of Mt Vesuvius.
The only other violation was in May of 1980, in Skamania County, Washington State. An immortal named Mooney was ambushed and beheaded while sleeping near an ancient Klickitat burial site. The attacking immortal, a fiery-tempered Incan warrior named Chinchaysuyu, was unaware of the area’s significance, and so he, too was struck down, consumed in the eruption of Mount St Helens.
It may come as a surprise that the area where this cache is hidden is still considered to be Holy Ground. When Lynn Valley was in its early days of settlement it had no churches. Reverend Ebenezer Robson of the Methodist Church in New Westminster would take the ferry across Burrard Inlet and make his way from Moodyville on the waterfront, up to Shaketown, which was the adopted name of the rough collection of shacks and cabins the loggers lived in. One of the larger huts where the Reverend would preach on a regular basis was situated right about here, and to this day the site retains its Holy Ground designation.
This cache holds no clues to the coordinates of the Gathering, but the hint contains some info you might find useful in your search.
Remember, there can be only ONE!