Retreat Garden National Park
Sink hole used as a well. Sink holes are also used in what is called Pothole farming.
The "Marked by Teachers" website offers this explanation.
Pothole Method
Pothole Farming is a time-honored technique used in the Bahamas. A practice passed on from generation to generation and initially experienced in Arawak agriculture. Potholes are pockets of fertile black or red soil that are found in rocky limestone areas.
The limestone rock of the Bahamas does not break-up to form a foundation for soil. But, it is dissolved by rainwater causing clearings in the limestone rock called potholes. Soil forms in these pockets of dissolved rock. The soil in the potholes is enriched by corroded plant materials called humus.