This hole is at the top of a large cavern, which also has a huge underwater hole open to the ocean. As waves come and go on the shore, the water in this hole rises and lowers, doing an endless and mesmerizing dance (as you saw in the previous video). The cavern below is called SPOTLIGHT CAVE because, around noon on a cloudless day (when the sun shines directly into this hole), there is a wonderfully-mysterious-looking beam of light which penetrates through the water of the cave to the delight of any lucky SCUBA diver who happens to be beneath (the beam is not something you see from the top here: For that you must be a diver!).

aijackandjoanneatspotlighthole