We have made several trips to this fantastic slot canyon full of petroglyphs out in Death Valley. It is a challenge to get in to see them. There are a couple of slick dry falls that need to be scaled. You will need someone with climbing ability and rope to get up to the main grotto with many of the petroglyphs. The site is certainly worth it, though!
Also, check out the Dzrtgrls trip report on this trip.
No directions to this unique place.