Irresponsible Journalism
SFGate ran this story about Tenaya Canyon, out hung it as a mystery spot with mysterious energy...
What they didn't say is that Tenaya Canyon is extremely dangerous, and should only be attempted late in the season during very low water--and only then by highly skilled people with the appropriate gear.
I hope to God no young adventurers try this in the next two months, as the canyon will be a slick bath tub with a roaring torrent at the bottom.