California Gardening: California Gardeners' Succulents #2, 1 by Calif_Sue

Calif_Sue wrote:
We went into some caves up by Shasta last weekend, off the beaten path. Called Pluto Caves, a giant lava tube formed by an eruption a lava which originated from a vent. The lava cooled leaving behind the solid rocky tube that remains today. Sadly, lots of graffiti marred the walls. From the trail flyer:
"The first record of it's discovery was by Nelson Cash in 1863 while he was gathering stray cattle. It was named Pluto's Cave after the Roman god of the underworld. However local Native Americans used the cave long before, and John Muir visited it and wrote about it in "Steep Tails" in 1888."

This was one interesting bit of graffiti though, dated 1917, left by an expedition by the fraternal organization 'International Order of the Red Men' (IORM)