Literary works employ the word "grotto" in a variety of ways that extend its meaning well beyond a simple geological formation. In some narratives, a grotto functions as a secret or intimate refuge—a hidden retreat where characters experience moments of transformation or sensual intrigue, as seen when it is affectionately referred to in a Victorian romance [1, 2]. In adventure and mystery tales, such as those by Dumas or Verne, the grotto becomes an essential waypoint and a labyrinthine setting that both shelters and challenges the protagonists [3, 4, 5, 6, 7]. Meanwhile, travelogues and historical reflections often depict grottos as naturally enchanting and symbolic spaces, evoking a sense of awe and sublime beauty in their secluded, shadowed recesses [8, 9]. This flexible use of "grotto" allows it to serve various narrative purposes—setting the stage for secret rendezvous, dangerous encounters, or moments of introspection—all while maintaining its evocative connection to mystery and the natural world [10, 11].