“There’s a series of ancient scrub systems. These are relic sand dunes left from times of much higher sea level. And the oldest and most ancient of these is a relic sand dune that runs down the middle of Florida, essentially about 150 miles… Orlando, due south.” “That ancient sand dune, still exists today as part of a near-desert environment in the middle of the state”…
The reseach was done by Kevin Pierce with the Florida Environment.
Check out the website
Looking for the Grate Placement.
Writing in the Sand.