Maniniholo Dry Cave, Kauai
If you take a drive along the north coast past Hanalei, you will see the Maniniholo Dry Cve, across the street from the Haena Beach State Park. The cave cuts several hundred yards into the base of a vertical cliff. The high roof at the entrance of the cvern gets progressively lowe as you want to the rear of the cave. There are spooky recesses and rooms off the main passageway which were too dark for us to explore without artificial light, which we didn't have. It is said that those who go back far enough will find a small gap which opens to the top of the cliff at the very back of the cave.
According to Hawaiian legend Maniniholo was the cheif fisherman for the Menehune, (fabled Leprechan-like folk who inhabited the island in prehistoric times. Maniniholo and other Menehune dug the cave in a vain effort to unearth an evil supernatural being called "akua," who had been stealing their fish. The Menehune never found the creature, and neither did we. But I may have seen his beady red eyes faintly glowing from a dark recess in the rock. GRIN!