I always thought of caves as a dark and dank place that I hope I would never get caught in without a source of light. Spelunking, or cave exploration clearly wasn't my thing. But walking through the open gaping hole in the earth down to its inner depths along an artistically lighted walkway that highlighted the classic limestone formations of a cave - the tall stalagmites and the dangling stalactites and straws, towering columns and thin curtains. The walkway wove through a profusion of such formations in the karst-laden cave, formed when acidic rainwater slowly dissolved naturally occurring limestone over thousands of years.
And even though I enjoyed my first, and subsequent visit, my irrational fear of caves still remain. This fear was reinforced when, on one of the guided trips, the ranger cut power to all the lights, leaving us tourists to bathe in darkness.
Carlsbad Caverns National Park
NM USA