These drawings are based on many years of exploring and visiting Texas and Mexico caves.    Some of the main influences on the drawings are from Natural Bridge Caverns in New Braunfels.   But other Texas caves such as Kickapoo, Cave of the Lakes, Midnight Cave and many more are captured in line drawings.   Grutas del Palmitto, also known as Grutas de Bustamante,  is the major influence from northern Mexico.  This is just a few of the drawings.