The pictographs and petroglyphs that ancient artists made using charred torch tips or sharp tools are visible in some passages.

The geometric designs — cross-hatched patterns, spirals, rectilinear shapes — are not figurative in the way that many people expect cave art to be.

They are abstract marks made in an underground space by people who had reason to mark it.

What visitors standing in those passages, holding a lantern, looking at marks made thousands of years ago — what they feel in that moment cannot be scripted or anticipated.

The cave produces specific psychological effects.