Just an added interesting note: Further up Furnace Spring Trail is
an old dump from the Stony Man Camp era with car parts.
Same car? Who knows, but perhaps it broke down and eventually
the door, bumper fell off and the chassis was washed down to its
present location through the years of harsh weather and storms.
Maybe unlikely, but it's always fun to imagine.
(The additional GPS coords mark the spot on the trail where you
can see these additional car parts.)