A striking stalagmite in Carlsbad Caverns, NM. Imaged in March 2014.
Photographing caves is difficult. If you like the above results, perhaps you'll find the following useful: 70 mm at f/19, ISO-1600, 1/2 second, +/- 3-stop HDR. Color balance tungsten lighting. Curves tool was used post-shoot to darken the background.