We are standing above a hole on top of an underwater cave. The cave opens (underwater) to the open ocean, so wave action causes the water to dance in front of us. Near the middle of the day the sun shines straight down into this hole. On much calmer days this is a popular dive site, and a mesmerizing, glimmering beam of light is cast from this "skylight" from top to bottom of the cave. Today, as you can see, waves were gushing forcefully against the shore, and rising awesomely from the hole.
From MARCH 16, 2015: BANZAI AND SPOTLIGHT