Inside Cypress Lawn Cemetery in Colma, CA there is what I refer to as "The Big Tree Thing" I have only been able to find one reference to it on the internet. It appears in a book called Alive in Necropolis and is referred to as "The Fern Grotto". There is definitely a stone structure underneath it all. Peering around the side I can see what looks to have been a walkway with a handrail made of tree branches. There is also an old bench that I could see looking over the edge. I know it's somebody's last resting place but who's? I talked to another person that visits here regularly and she said that not even staff can tell her who is buried here. I'd estimate the structure somewhere between 40 and 60ft tall. Around the side it has a gate with a sign that of course says "Caution Keep Out". It looks like one of these days when nobody is looking I'll have to risk life and limb to jump the fence and see what's in there.