50°39′53″N 4°43′09″W / 50.6648°N 4.7192°W
Saint Nectan's Glen (Cornish: Glynn Nathan, meaning deep wooded valley of Nathan/Nectan) is an area of woodland in Trethevy near Tintagel, north Cornwall stretching for around one mile along both banks of the Trevillet River. The glen's most prominent feature is St Nectan's Kieve, a spectacular sixty foot waterfall through a hole in the rocks. The site attracts tourists who believe it to be "one of the UK's most spiritual sites," and tie or place ribbons, crystals, photographs, small piles of flat stones and other materials near the waterfall.[1][2]
cg
was invoked but never defined (see the help page).