Fujichrome 100, OM-2S, 90mm macro lens, 1/60 second at f/11, T-32 electronic flash, handheld, ES-10.
"I jokingly refer to this speleothem as 'the brain'. It is a strange type of stalagmite/flowstone mass formed by water falling over 100 feet from the ceiling above. The colors are imparted by mineral impurities in the water."